Question

hola aguien me ayude con algunos de estos ejercicios paso a paso xf de urg 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)

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