Question

Resolva as equações

a) 10 + (x-2)=5-(x+4)

b) 2x + (5-x)=3-3x+6

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

Answer 1

10 + x - 2 = 5 - x - 4
8 + x = 1 - x
x + x = 1 - 8
x = -7/2

2x + 5 - x = 3 - 3x + 6
x + 5 = 9 - 3x
x + 3x = 9 - 5
x = 4/4 = 1

4x - 8 - 2x - 2 = 4
2x - 10 = 4
2x = 4 + 10
x= 7

Answer 2

10 + x - 2 = 5 - x - 4
8 + x = 1 - x
x + x = 1 - 8
x = -7/2

2x + 5 - x = 3 - 3x + 6
x + 5 = 9 - 3x
x + 3x = 9 - 5
x = 4/4 = 1

4x - 8 - 2x - 2 = 4
2x - 10 = 4
2x = 4 + 10
x= 7