Question

 

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a) 5-3x = x-15

b) 17-6x = 4x-8

c) 23+x = 2-2x

Answer 1

a) 5 - 3x = x - 15

5 = 4x - 15

4x = 20

x = 5

b) 17 - 6x = 4x- 8

17 = 10x - 8

10x = 25

x = 2,5

c) 23 + x = 2 - 2x

23 + 3x = 2

3x = -21

x = -7

Answer 2

a) 5-3x = x-15

5+15 = 3x+x

20 = 4x

x = 20 : 4

x = 5

b) 17-6x = 4x-8

17 + 8 = 6x + 4x

25 = 10x

x = 25 : 10

x = 2,5

c) 23+x = 2-2x

23 + x + 2x = 2

23 + 3x = 2

3x = 2 - 23

3x = -21

x = -21 : 3

x = -7