Question

a) 3x + 2 = 11


b) 4 = 3x + 1


c) –0,5x = 4,5

Answer 1

Explicação passo-a-passo:

a)

$3x + 2 = 11$

$3x = 11 - 2$

$3x = 9$

$x = \frac{9}{3}$

$x = 3$

b)

$4 = 3x + 1$

$4 - 1 = 3x$

$3 = 3x$

$x = \frac{3}{3}$

$x = 1$

c)

$- 0.5x = 4.5$

$x = \frac{4.5}{ - 0.5}$

$x = - 9$

d)

$2x - 5 \geqslant 23$

$2x \geqslant 23 + 5$

$2x \geqslant 28$

$x \geqslant \frac{28}{2}$

$x \geqslant 14$