Question

Решите уравнение 7х-15=5х+5(2х+1)

Answer 1

7х-15 = 5х+10х+5
7х-5х-10х = 5+15
-8х = 20
х = -20/8 = -10/4 = -5/2 = -2,5

Answer 2

7x-15=5x+10x+5
7x-15=15x+5
-20=8x
X=-2.5