Question

A 1 com cálculo pfvrrrrrr

Answer 1

Resposta:

$1) \frac{x}{2} + \frac{x}{3} = 140 \\ \\ \frac{3x + 2x}{6} = 140 \\ \\ 5x = 840 \\ x = \frac{840}{5} \\ x = 168$

2)

$\frac{x}{3} - \frac{x}{5} = 140 \\ \\ \frac{5x - 3x}{15} = 140 \\ \\ 2x = 2100 \\ x = 1050$

3)

$3x + 4 < x + 12 \\ 3x - x < 12 - 4 \\ 2x < 8 \\ x < 4$