1. A. talked                        B. painted                          C. asked                     D. liked

2. A. worked                      B. stopped                         C. forced                     D. wanted

3. A. waited                       B. mended                         C. objected                  D. faced

4. A. roses                         B. villages                         C. apples                     D. matches

5. A. succeeds                   B. devotes                         C. prevents                  D. coughs

6. A. kissed                        B. helped                           C. forced                     D. raised

7. A. sees                           B. sports                            C. pools                     D. trains

8. A. tombs                        B. lamps                            C. brakes                     D. invites

9. A. books                        B. floors                            C. combs                     D. drums

10. A. devoted                   B. suggested                      C. provided                  D. wished

11. A. stops                         B. climbs                          C. pulls                     D. televisions

12. A. cats                         B. tapes                             C. rides                     D. cooks      

13. A. agreed                     B. missed                           C. liked                     D. watched

14. A. walks                      B. begins                           C. helps                     D. cuts

15. A. shoots                      B. grounds                         C. concentrates  D. forests

16. A. hours                       B. fathers                           C. dreams                    D. thinks

17. A. beds                        B. doors                             C. plays                     D. students

18. A. worried                   B. bored                            C. disappointed  D. annoyed

19. A. comes                     B. rolls                              C. takes                     D. drives

x+99:3=55

=>x+33=55

=>x=55-33=22

x =22 nha

Gọi số chia là x

Số bị chia là x+13748

Thương là 3 và dư là 2180 nên ta có:

x+13748=3x+2180

=>3x-x=13748-2180

=>2x=11568

=>x=5784

Vậy: Số chia là 5784

Số bị chia là 5784+13748=19532

\(3^5\cdot x=\left(-3\right)^7\)

=>\(x\cdot3^5=-3^7\)

=>\(x=-\dfrac{3^7}{3^5}=-3^2=-9\)

Xe đó chở số kg gạo là: 

\(30\times50=1500\left(kg\right)\)

Xe đó chở số kg ngô là:

\(40\times60=2400\left(kg\right)\)

Xe đó chở tổng cộng số kg là:

\(1500+2400=3900\left(kg\right)\)

ĐS: ...

Khối lượng ngô xe chở là 40x60=2400(kg)

Khối lượng gạo xe đó chở là 30x50=1500(kg)

Tổng khối lượng là 2400+1500=3900(kg)

d: \(\left(315-x\right)+264=327\)

=>315+264-x=327

=>579-x=327

=>x=579-327=252

h: 12x-59=25

=>\(12x=59+25=84\)

=>\(x=\dfrac{84}{12}=7\)

e: 735-(457+x)=124

=>x+457=735-124=611

=>x=611-457=154

k: 36-x:2=16

=>x:2=36-16=20

=>\(x=20\cdot2=40\)

l: 60-3(x-2)=51

=>3(x-2)=60-51=9

=>x-2=3

=>x=3+2=5

m: \(\left(3x-15\right)\cdot7=42\)

=>\(21\left(x-5\right)=42\)

=>x-5=2

=>x=2+5=7

n: \(558-\left(15:x+29\right)\cdot17=14\)

=>\(\left(15:x+29\right)\cdot17=558-14=544\)

=>15:x+29=544:17=32

=>15:x=32-29=3

=>x=15:3=5

p: 30-3x=5*54

=>30-3x=270

=>3x=30-270=-240

=>\(x=-\dfrac{240}{3}=-80\)

q: \(3\left(x-2\right)+2\left(x+5\right)=29\)

=>3x-6+2x+10=29

=>5x+4=29

=>5x=25

=>x=5

v: x+(x+1)+(x+2)+...+(x+30)=1240

=>31x+(1+2+...+30)=1240

=>\(31x+30\cdot\dfrac{31}{2}=1240\)

=>x+15=40

=>x=40-15=25

t: (27-3x)(x-5)=0

=>3(9-x)(x-5)=0

=>(9-x)(x-5)=0

=>(x-9)(x-5)=0

=>\(\left[{}\begin{matrix}x-9=0\\x-5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=9\\x=5\end{matrix}\right.\)

\(a.187+x=320\\ =>x=320-187=133\\ b.765-x=158\\=> x=765-158=607\\ c.451+\left(x-218\right)=876\\ =>x-218=876-451=425\\ =>x=425+218=643\\ d.\left(315-x\right)+264=327\\ =>315-x=327-264=63\\ =>x=315-63=252\\ e.735-\left(457+x\right)=124\\=>457+x=735-124=611\\ =>x=611-457=154\)

She lives in Sydney, Australia

CCứu mik cần gấp

Tỉ số giữa số con Ngan và tổng số con là \(\dfrac{1}{4+1}=\dfrac{1}{5}\)

Tỉ số giữa số vịt và tổng số con là \(1-\dfrac{1}{5}-\dfrac{2}{3}=\dfrac{1}{3}-\dfrac{1}{5}=\dfrac{2}{15}\)

Tổng số con là \(90:\dfrac{2}{15}=90\times\dfrac{15}{2}=675\left(con\right)\)