Question

Identifique entre as alternativas abaixo aquela que representa corretamente o valor de X na equação: 100X + 80 = 120X - 40X - 300

Answer 1

100X+80=120X-40X-300
100X-120X+40X=-300-80
-20X+40X=-380
X=-380/20
X=-19

Answer 2

100X+80=120X-40X-300
100X-120X+40X=-300-80
-20X+40X=-380
X=-380÷
20
X=-19