Question

Simplifique as expressões algébrica :B) -2 (2x-4)+5(-2x-10)=.

Answer 1

-2(2x-4)+5(-2x-10)=0 ⇒ -4x+8-10x-50=0 ⇒ -14x-42=0 ⇒ 14x= -42 ⇒ x= -42/14 ⇒ x= -3