Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 42:y=56:8 b) y:6+25=83 c) y:4=32(dư 3) d) y:7-45=18 e) 42:y=5(dư 2) g) 51:y=6(dư 3)
42:y=7 y:6=83-25 y=32*4+3 y:7=18+45 y=(42-2):5 y=(51-3):6
y=42:7 y:6=58 y=128+3 y:7=63 y=40:5 y=48:6
y=6 y=58*6 y=131 y=63*7 y=8 y=8
y=348 y=441
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
+) \(\dfrac{7}{8}\times y=\dfrac{3}{2}+\dfrac{6}{4}=3\)
\(y=3:\dfrac{7}{8}=\dfrac{24}{7}\)
+) \(\dfrac{1}{y}\times\left(\dfrac{2}{5}+\dfrac{1}{5}\right)=\dfrac{10}{3}\)
\(\dfrac{1}{y}=\dfrac{10}{3}:\dfrac{3}{5}=\dfrac{50}{9}\)
\(y=\dfrac{9}{50}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a.10+13+16+19+.......+97+100
=(10+100)+(13+97)+(16+94)+.....+(52+58)+55
=110+110+110+.......+110+55
=110x18+55
=1980+55
=2035
b.5+10+15+20+.......+95+100
=(100+5)+(10+95)+....+(55+50)
=105+105+...+105
=105x10
=1050
tim x,y biet:
c.135-y:4=106
y:4=135-106
y:4=29
y=29:4
y=\(\frac{29}{4}\)
d.356:y+241=245
256:y=245-241
356:y=4
y=356:4
y=89
![](https://rs.olm.vn/images/avt/0.png?1311)
a) y + y x 5 = 50
=> 2y x 5 = 50
=> 2y = 50 : 5
2y = 10
=> y = 10 : 2
y = 5
![](https://rs.olm.vn/images/avt/0.png?1311)
Lời giải:
$50=4\times y+2$
$50-2=4\times y$
$48=4\times y$
$48:4=y$
$12=y$
![](https://rs.olm.vn/images/avt/0.png?1311)
a)y x (3+5+1)=7829+289=8118
y x 9=8118
y=902
Vậy y=902
b)32+19-y=28
51-y=28
y=51-28
y=23
Vậy y=23
Học giỏi nhé!!! ^.^
a ) y x ( 3+5+1) = 7829 + 289
y x 9 = 8118
y = 8118 : 9 902
b ) 32 + 19 - y = 28
51 - y =28
y = 28 + 51
y = 79
a + nha 3213