Question

a) 3(x+2) = 5 + x
b) 400-x = 2x + 100

Answer 1

Explicação passo-a-passo:

3(x+2) = 5 + x

3x+6=5+x

3x-x=5-6

2x=-1

x=-1/2

400-x = 2x + 100

-x-2x=100-400

-3x=-300(-1)

3x=300

x=300/3

x=100