Question

resolva as equações a ) 4 x+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 + 9 = x - 6
4x - x = - 6 - 9
3x = -15
x = - 15/3
x = - 5

b) 5x - 3 + 2x = x - 3x
5x + 2x - x + 3x = 3
9x = 3
x = 3/9
x = 1/3

c) 2x + 4 - x = 2 ( x - 1 )
2x + 4 - x = 2x - 2
2x - x - 2x = - 2 - 4
- x = - 6 (-1)
x = 6

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

Answer 2

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

b) 5x - 3 + 2x = x - 3x
5x + 2x  - x + 3 x = 3
9 x= 3
x = 3/9
x = 1/3

c) 2 x + 4 - x =2(x - 1)
2x + 4 - x = 2x - 2
2x - x - 2x = -2 -4
- x= - 6
x = 6

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