Question

Resolva as equações:
A) 6x+9-4x+4=3

B) 5x-15-4x-8=2+3-6x

Answer 1

vamos ver

$a) 6x - 4x + 9 + 4 = 3 \\ (6 + 4)x = 10x \\ 9 + 4 = 13 \\ 10x + 13 = 3 \\ 10x = (3 - 13 = - 10) \\ x = - \frac{10}{10} \\ \boxed {x = - 1}$

$b)5x-15-4x-8=2+3-6x \\ (5x - 4x - 15 - 8 = x - 7) = (2 + 3 - 6x = 5 - 6x) \\ x - 7 = 5 - 6x \\ x + 6x = 5 + 7 \\ 7x = 12 \\ \boxed {x = \frac{12}{7}}$

Answer 2

a)6x+9-4x+4=3

2x=3-9-4

2x=-10

x=-10/2

x=-5

b) 5x-15-4x-8=2=3-6x

7x=3+15+8

7x=26

x=7/26