Question

x sobre 2 + 4x = 15 - (-x-6)

Answer 1

2+4x=-15x+90
4x+15x=90-4
19x=86
x=86/19
x=4,52

Answer 2

5x/2 =15 + x + 6
5x/2 = 21 + x
5x/2 -x = 21
4x/2 = 21
Simplifica o 4x/2 = 2x
2x = 21