Question

Решите уравнение x-1+(x+2)=-4(-5-x)-5

Answer 1

x-1+x+2=20+x-5
2x+1=15+4x
x=-7

Answer 2

$x-1+(x+2)=-4(-5-x)-5 \ \ x-1+x+2=20+4x-5 \ \ x+x-4x=20-5+1-2 \ \ -2x=14 \ \ x= 14 : (-2) \ \ x = (-7)$