Question

Ajudem? Por favor ↓ obrigada.

1) - 10 + 4 - 2X = 4X - 7
2) 2 - 4X = 32 - 18X + 12
3) 2X + 3 = 9
4) 3X + 7 = X + 3
5) -7X + 4 + 10X = 4 - 2
6) 5 + 6X = 5X + 2
7) 2 - 3X = -2X + 12 - 3X

Answer 1

a)
-6-2x = 4x-7
-2x-4x = -7+6
-6x = -1.(-1)
6x = 1
x = 1/6

b)
2-4x = 44-18x
-4x+18x=44-2
14x = 42
x = 42/14
x = 3

c)
2x = 9-3
2x = 6
x= 6/2
x = 3

d)
3x + 7 = x + 3
3x - x = 3 - 7
2x = - 4
x = -4/2
x = - 2

e)
3x + 4 = 2
3x = 2-4
3x = -2
x = -2/3

f)
5 + 6x = 5x + 2
6x - 5x = 2 - 5
x = - 3

g)
2 - 3x = - 5x + 12
- 3x + 5x = 12 - 2
2x = 10
x = 10/2
x = 5.