Question

Resolva as equações:
a) 4x + 9= x - 6

b)5x - 3 + 2x = x + 3x

c)2x + 4 -x = 2(x + 1)

d) 5(3x + 2) = 4 - 4x - 10

Answer 1

$a) 4x-x=-6-9 \\ 3x=-15 \\ x=-5 \\ b) 5x+2x-x-3x=3 \\ 3x=3 \\ x=1 \\ c) 2x-x-2x=2-4 \\ -x=-2 \\ x=2 \\ d)15x+4x=4-10-10 \\ 19x=-16 \\ x=-16/19$

Answer 2

a) 4x - x = -6 -9
3x = -15
x = -15/3
x= -5

b) 5x +2x -x -3x = +3
3x = +3
x = 3/3
x = 1

c) 2x + 4 -x = 2(x + 1)
2x - x = 2x + 2 - 4
2x - x - 2x = +2 - 4
-1x = -2
x = -2 / -1
x = 2


d) 5(3x + 2) = 4 - 4x - 10
15 x + 10 = 4 - 4x - 10
15x + 4x = 4 - 10 - 10
19 x = - 16
x = -16 / 19
x =    -   16/19 ( 16 dividido por 19 )