Question

a)3×+5=×+15
b)3x+1=5+×

Answer 1

Resposta:

a)

$3x + 5 = x + 15 \\ 3x - x = 15 - 5 \\ 2x = 10 \\ x = 10 \div 2 \\ x = 5$

b)

$3x + 1 = 5 + x \\ 3x - x = 5 - 1 \\ 2x = 4 \\ x = 4 \div 2 \\ x = 2$

Answer 2

Resposta:

$3x + 5 = x + 15 \\ 3x - x = 15 - 5 \\ 2x = 10 \\ x = \frac{10}{2} \\ x = 5 \\ \\ 3x + 1 = 5 + x \\ 3x - x = 5 - 1 \\ 2x = 4 \\ x = \frac{4}{2} \\ x = 2$