Đêm r , ko ai trl nx âu

thì đợi

\(3x+\frac{2}{5}-2x=\frac{3}{2}\)

\(3x-2x-\frac{2}{5}=\frac{3}{2}\)

\(x-\frac{2}{5}=\frac{3}{2}\)

\(x=\frac{3}{2}+\frac{2}{5}\)

\(x=\frac{19}{10}\)

Vậy \(x=\frac{19}{10}\)

3x+2/5 -2x =3/2

x+2/5   =3/2

x   =3/2 -2/5

x=   15/10 -4/10

x=11/10

a)111222=333×334

b)444222=666×667

ủng hộ nha

a,111222 = 333 x 334

b,444222 = 666 x 667

111222=333x334

444222=666x667

a) \(111222=333\times334\)

b) \(444222=666\times667\)

Chúc bạn học tốt !!!

\(\Rightarrow A=\frac{\frac{3}{4}-\frac{6}{10}+\frac{3}{7}+\frac{3}{11}}{\frac{11}{4}-\frac{22}{10}+\frac{11}{7}+\frac{11}{13}}\)

\(\Rightarrow A=\frac{3.\left(\frac{1}{4}-\frac{2}{10}+\frac{1}{7}+\frac{1}{13}\right)}{11.\left(\frac{1}{4}-\frac{2}{10}+\frac{1}{7}+\frac{1}{13}\right)}\)

\(\Rightarrow A=\frac{3}{11}\)

!

a,   111222 = 111 x1000 + 222 = 111 x 1000 + 111 x 2 = 111 x (1000 + 2) = 111 x 1002= 111 x 3 x 334  = 333 x 334

b, 444222 = 444 x 1000 + 222= 444 x 1000 + 222 =  222 x 2 x 1000 + 222 = 222 x (2000 + 1)= 222 x 2001 = 222 x 3 x 667 = 666 x 667

Học tốt

^^

a)111222=333×334

b)444222=666×667

ủng hộ nha

|X-15|+|2,5-X|=0

* x -15=0

       x= 0+15

      x=15

*2,5-x = 0

       x= 2,5 - 0

       x= 2,5

=> x = 15 hoặc x= 2,5