Question

alguém me ajuda por favor a) 4x-2=3x b) 12x+5=-2 c) x+7=15 d) 6x+2x=-14x e) 5x+2x=10x f) 8x+ 4=-4x g) 5x+6=+2x h) 16x+2=6x i) 10x-4=-2x​

Answer 1

Olá, tudo bem?

A)

$4x - 2 = 3x \\ 4x - 3x = 2 \\ 1x = 2 \\ x = \frac{2}{1} = 2$

B)

$12x+5=-2 \\ 12x = - 5 - 2 \\ 12x = - 7 \\ x = \frac{ - 7}{12}$

c)

$x+7=15 \\ x = - 7 + 15 \\ x = 8$

D)

$6x+2x = - 14x \\ 6x + 2x + 14x = 22x$

e)

$5x+2x=10x \\ 5x + 2x + 10x = 17x$

$8x+ 4=-4 \\ 8x = 4 - 4 \\ 8x = 0 \\ x = \frac{1}{8} = (8x)$

G)

$5x+6=+2x \\ 5x - 2x = - 6 \\ 3x = - 6 \\ x = \frac{ - 6}{3 } \\ x = -2$

H)

$16x+2=6x \\ 16x - 6x = - 2 \\ 10x = - 2 \\ x = \frac{ - 2}{10}$

I)

$10x-4=-2x \\ 10x + 2x = 4 \\ 12x = 4 \\ x = \frac{4}{12}$