Question

Resolva as seguintes equações abaixo: (cálculos pfvr)

a) 5x + 5 = 6x + 2
b) 12 + x = 2x + 2
c) 6x = 2x + 16
d) 45 - 2x + 5 = 4x – 15 – 25

Answer 1

Opa, de boa?

a)

$5x + 5 = 6x + 2 \\ 5x - 6x = + 2 - 5 \\ - x = - 3 \times ( - 1) \\ x = 3$

b)

$12x + x = 2x + 2 \\ 12x + x - 2x = 2 \\ 13x - 2x = 2 \\ 11x = 2 \\ x = \frac{2}{11}$

c)

$6x = 2x + 16 \\ 6x - 2x = 16 \\ 4x = 16 \\ x = \frac{16}{4} \\ x = 4$

d)

$45 - 2x + 5 = 4x - 15 - 25 \\ - 2x - 4x = - 15 - 25 - 45 - 5 \\ - 6x = - 90 \times ( - 1) \\ 6x = 90 \\ x = \frac{90}{6} \\ x = 15$

Espero ter ajudado

Att. stephannykamyly

Answer 2

olá !!!

$a)\\5x + 5 = 6x + 2-x=2-5\\-x=-3\\x=3\\\\b)\\12 + x = 2x + 2x-2x=2-12\\-x=-10\\x=10\\\\c)\\6x = 2x + 16\\6x-2x=16\\4x=16\\x=16/4\\x=4\\\\d)\\45 - 2x + 5 = 4x- 15 - 25\\-2x-4x=-35-5-45\\-6x=--85\\x=85/6\\x=14,1$

espero ter ajudado

Att: Jovem lendário