Question

tìm x biết -12(x-5)+7(3-x)=5

Answer 1

-12x+60+21+7x=5

-5x+81=5

-5x=5-81=-76

x=\(\frac{76}{5}\)

Answer 2

-12(x - 5) + 7(3 - x) = 5

-12x + 60 + 21 - 7x = 5

-19x + 81 = 5

-19x = 5 - 81 = -76

x = -76 : (-19) = -4 

Answer 3

Nhầm

-12x+60+21-7x=5

-19x+81=5

-19x=5-81=-76

x=(-76):(-19)=4