Question

-40 * (-7х + 5) = -1600

Answer 1

-40 * (-7х + 5) = -1600


(-7х + 5) =-1600/(-40)

-7x+5=40    x= (40-5)/(-7)    x=-5
 
проверка

-40 * (-7·(-5) + 5) =-40(35+5)= -1600  верно...