Question

Efetue 3 (5 - x ) -3 ( 1 -2x ) = 42 * 5 pontos A10 B15 C-5 ​

Answer 1

3(5 - x) -3(1 - 2x) = 42

15 - 3x - 3 - 6x = 42

3x - 6x = 42 - 15 + 3

-3x = 30

x = 30

/-3

x = -10