Question

Математики нужна помощь!!!!!!

a) −5(8−6x) = −40


b) (7x+2)⋅(−5) = 10

Answer 1

-40+30x=-40

30x=-40+40

30x=0

x=0

-5(8-6×0)=-5×(8-0)=-5×8=-40

7x+2=10÷(-5)

7x+2=-2

7x=-2-2

7x=-4

x=-4/7

(7×(-4/7)+2)×(-5)=(7/1×(-4/7)+2)×(-5)=(-28/7+2)×(-5)=-4+2×(-5)=-2×(-5)=10