-40 * (-7х + 5) = -1600

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...

Comments

Спсибо

Answer 2

280x - 200 = - 1600
280x = 200 - 1600
280x = - 1400
x = -1400/280
x = -5