Question

5- Aplique a propiedade distributiva e resolva as equações:

Answer 1

Resposta:

$b) \: 4 \times (x + 3) = 2 \times (12 - x) \\ 4x + 12 = 24 - 2x \\ 4x + 12 - 24 + 2x = 0 \\ 6x - 12 = 0 \\ 6x = 12 \div (6) \\ x = 2$

$c) \: 2 \times (x + 4) - 3 \times (x + 2) = 10 \\ 2x + 8 - 3x - 6 = 10 \\ - x + 2 - 10 = 0 \\ - x - 8 = 0 \\ - x = 8 \times ( - 1) \\ x = - 8$

$d) \: 5 \times (x + 1) - 2 \times ( x + 3) = 11 \\ 5x + 5 - 2x - 6 = 11 \\ 3x - 1 = 11 \\ 3x = 11 + 1 \\ 3x = 12 \div (3) = \\ x = 4$