Question

6 Resoha as
equações:
a) 3x+5=23
b) 2x+10=18
C) 5x+4-3x+10
d) 12x+6 = 5x-43
e) 6x+9=3x-5
f) 2x-4:x+8​

Answer 1

Explicação passo-a-passo:

a)$3x+5=23$

$3x=23-5$

$3x=18$

$x=\frac{18}{3}$

$x=6$

b)

$2x+10=18\\2x=18-10\\2x=8\\x=\frac{8}{2} \\x=4$

c)

$5x+4-3x+10\\5x-3x+10+4\\ 2x+14$

d)

$12x+6 = 5x-43\\12x=5x-43-6\\12x=5x-49\\12x-5x=49\\7x=-49\\x=\frac{-49}{7} \\x=-7$

e)

$6x+9=3x-5\\6x=3x-5-9\\6x=3x-14\\6x-3x=-14\\3x=-14\\x=\frac{-14}{3}$

f)

$2x-4 + 8/x\\\frac{2x + (8 - 4)}{x} \\\frac{2x + 4}{x} \\2 + \frac{4}{x}$