Question

1) Resolva:

a) 2x - 10 = 12

b) 3x + 15 = 24

c) 5x - 12 = 13​

Answer 1

$a) \: 2x - 10 = 12 \\ 2x = 12 + 10 \\ 2x = 22 \\ x = \frac{22}{2} \\ x = 11 \\ \\ \\ b) \: 3x + 15 = 24 \\ 3x = 24 - 15 \\ 3x = 9 \\ x = \frac{9}{3} \\ x = 3 \\ \\ \\ c) \: 5x - 12 = 13 \\ 5x = 13 + 12 \\ 5x = 25 \\ x = \frac{25}{5} \\ x = 5$

Espero ter ajudado!

Answer 2

Explicação passo-a-passo:

a)

$2x = 12 + 10 \\ 2x = 22 \\ x = 22 \div 2 \\ x = 11$

b)

$3x = 24 - 15 \\ 3x = 9 \\ x = 9 \div 3 \\ x = 3$

c)

$5x = 13 + 12 \\ 5x = 25 \\ x = 25 \div 5 \\ x = 5$