Question

Resolva as inequações
a)5x-9≥3x3
b)4(x+1)+3x<2(x+2)+10

Answer 1

RESPOSTA

A)

$5x - 9 \geqslant 3x \\ 5x - 9 \geqslant 9x \\ 5x - 9x \geqslant 9 \\ - 4x \geqslant 9 \\ x \leqslant - \frac{9}{4}$

B)

$4x(x + 1) + 3x < (x + 2) + 10 \\ 4x + 4 + 3x < 2x + 4 + 10 \\ 4x + 3x < 2 \times + 10 \\ 7x < 2x + 10 \\ 7x - 2x +10 \\ 5x < 10 \\ x < 2$