Question

Resolva as seguintes inequações.
a) x − 1 < 4
b) − 5x − 31 ≥ −29
c) y = 5x + 48 > 15x − 26

Answer 1

Explicação passo-a-passo:

a)x-1<4

x<4+1

x<5

$b) - 5x - 31 \geqslant - 29 \\ - 5x \geqslant - 29 + 31 \\ - 5x \geqslant 2 \: \: \times ( - 1) \\ 5x \leqslant - 2 \\ x \leqslant \frac{ - 2}{5}$

c) 5x+48>15x-26

5x-15x>-26-48

-10x>-74 ×(-1)

10x<74

x<74/10

x<7,4