Question

13 - 4x = - 6x + 17
x = ¿?

39 - 15x = - 31 - 5x
x = ¿?

x + 1 = 18x - 10
x = ¿?

120 + 36x = - 12x
x = ¿?

-x + 15 = 5x - 45
x = ¿?

Answer 1

13 - 4x = - 6x + 17
6x-4x = 17-13
2x = 4
x = 4/2
x = 2


39 - 15x = - 31 - 5x
39+31 = 15x-5x
70 = 10x
70/10 = x
7 = x


x + 1 = 18x - 10
1+10 = 18x-x
11 = 17x
11/17 = x

120 + 36x = - 12x
36x+12x = 120
48x = 120
x = 120/48
x = 5/2

-x + 15 = 5x - 45
15+45 = 5x+x
60 = 6x = 
60/6 = x
10 = x

Answer 2

1.  x=2
2:  x=7
3.  x=11/17
4.  x=5/12
5.  x=10
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