Question

a) x + 5 = 7
b) 2x + 4 = 10
c) 5x + 5 = 15

Answer 1

Explicação passo-a-passo:

a)

$x + 5 = 7$

$x = 7 - 5$

$\boxed{x = 2}$

b)

$2x + 4 = 10$

$2x = 10 - 4$

$2x = 6$

$x = \frac{6}{2}$

$\boxed{x = 3}$

c)

$5x + 5 = 15$

$5x = 15 - 5$

$5x = 10$

$x = \frac{10}{5}$

$\boxed{x = 2}$