Question

a) 5x-2x=18+3x
b) 7x - 1 = 13
c) 3 . (x + 2) = 15
d) 5 (2x - 4) = 7 . (x + 1) - 3
e) 6x = - 2x + 16
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Answer 1

a) 5x - 2 = 18 + 3x

5x - 3x = 18 + 2

2x = 20

x = 20/2

x = 10

b) 7x - 1 = 13

7x = 14

x = 14/7

x = 2

c) 3 . (x + 2) = 15

3x + 6 = 15

3x = 15 - 6

3x = 9

x = 9/3

x = 3

d) 5 . (2x - 4) = 7 . (x + 1) - 3

10x - 20 = 7x +  7 - 3

10x - 7x = 7 - 3 + 20

3x = 24

x = 24/3

x = 8

e)  6x = - 2x + 16

6x + 2x = 16

8x = 16

x = 16/8

x = 2