Question

resolva as equação do 1° grau.​

Answer 1

A)

$x + 5 = 10$

$x = 10 - 5$

$x = 5$

B)

$5x - 9 = 2x + 30$

$5x - 2x = 30 + 9$

$3x = 39$

$x = 39 \div 3$

$x = 13$

C)

$y + 12 = 18$

$y = 18 - 12$

$y = 6$

D)

$7x - 19 = 5(x - 2) + 1$

$7x - 19 = 5 - 2x + 1$

$7x + 2x = 1 + 19$

$9x = 20$

$x = \frac{20}{9}$