Question

Решите уравнение:
А)0.4(3x+1)=5.6-3(2-0.4x)
Б)4x-9(x-7)=-12

Answer 1

$A)0.4(3x+1)=5.6-3(2-0.4x) \ 1.2x+0.4=5.6-6+1.2x \ 1.2x-1.2x=5.6-6-0.4 \ 0x=-0.8\  \ \ B)4x-9(x-7)=-12 \ 4x-9x+63=-12 \ -5x=-75 \ x=15$