Question

Qual e a resposta dessa equação de 1 grao 5x+7x-30=2x+90

Answer 1

5x + 7x - 30 = 2x + 90
5x + 7x - 2x = 90 + 30
10x = 120
X = 120/10
X = 12

Answer 2

12x-30=2x+90
12x-2x=90+30
10x=90+30
10x=120
x=12