Question

1) x-3=3-x


2) 6x + 12x -3 – 7x + 4= 0


3) 20 – 7x = 6x – 6


4) 7x+2 = 10x+5



5) 4x + 4 + 9x + 18 = 12 (x+2)


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Answer 1

1) x - 3 = 3 - x
x + x = 3 + 3
2x = 6
x = 6/2
x = 3

2) 6x + 12x - 3 – 7x + 4 = 0
18x - 7x - 3 + 4 = 0
11x + 1 = 0
11x = - 1
x = -1/11

3) 20 – 7x = 6x – 6
–7x –6x = –6 – 20
–13x = –26
x = -26/-13
x = 2

4) 7x + 2 = 10x + 5
7x - 10x = 5 - 2
- 3x = 3
x = 3/-3
x = - 1

5) 4x + 4 + 9x + 18 = 12 (x + 2)
4x + 4 + 9x + 18 = 12x + 24
4x + 9x - 12x = 24 - 4 - 18
13x - 12x = 20 - 18
1x = 2
x = 2/1 ----> 2