Question

Resolva as equações
A) 5x+7=2x-5
B)2(x -3) = 14 - 3x
C) x/2 + 3/4=1

Answer 1

a) $5x+7=2x-5$

$5x - 2x + 7 = -5$

$5x - 2x = -5 -7$

$3x = -5 -7$

$3x = -12$

$x = -4$

b) $2(x -3) = 14 - 3x$

$2x - 6 = 14 - 3x$

$2x + 3x - 6 = 14$

$2x + 3x = 14 + 6$

$5x = 14 + 6$

$5x = 20$

$x = 4$

c) $\frac{x}{2} + \frac{3}{4} = 1$

$2x + 3 = 4$

$2x = 4 - 3$

$2x = 1$

$x = \frac{1}{2}$

espero ter ajudado!