Question

Tìm x

a,2/3x=-4/27

b,1/3+1/2:x=-4

Answer 1

2/3x = -4/27

=> 2 . 27 = 3x . (-4)

=> 54 = 3x . -4

=> 3x = -27/2

=> x = -9/2

1/3 + 1/2 : x = -4

=> 1/2 : x = -13/3

=> x = -3/26 

Answer 2

a, \(\frac{2}{3}x=-\frac{4}{27}\)

\(x=-\frac{4}{27}:\frac{2}{3}=-\frac{4}{27}.\frac{2}{3}=-\frac{8}{81}\)

Bài này lớp 7 hả trời @@