Question

x+8=9

2x+5=9x-7

7x+20=-x-9

x-2=20-8x

x-2=5x+9

x-9=20x-6

4x-9=-9-x+x

10x-10x+8=-x-1

Answer 1

Respuesta:

x + 8 = 9
x = 9 - 8
x = 1

2x + 5 = 9x - 7
7 + 5 = 9x - 2x
12 = 7x
12 / 7 = x
x = 12 / 7

7x + 20 = - x - 9
7x + x = - 20 - 9
8x = - 29
x = - 29 / 8

x - 2 = 20 - 8x
x + 8x = 2 + 20
9x = 22
x = 22 / 9

x - 2 = 5x + 9
x - 5x = 2 + 9
- 4x = 11
x = 11 / - 4
x = - 11 / 4

x - 9 = 20x - 6
x - 20x = 9 - 6
- 19x = 3
x = 3 / - 19
x = - 3 / 19

4x - 9 = - 9 - x + x
4x - 9 = - 9
4x = 9 - 9
4x = 0
x = 0 / 4
x = 0

10x - 10x + 8 = - x - 1
8 = - x - 1
x = - 8 - 1
x = - 9