Question

-x -5 +4x = -7x +6x +15

Qual o cálculo?

Answer 1

-x-5+4x + 7x+6x +15
-x+4x-7x-6x + 15+5
-10x+ 20, (-1)
x= -20/10
x=-2

Answer 2

3x-5=-x+15
x-3x=15+5
-2x=20 .(-1)
2x= -20
x=-20/2
x=-10