Question

a) 3x – 12 = 33 f) 3x = 48 – x
b) 2x = 21 – x g) 2x + 5 = 35
c) 2x + 9 = 79 h) 2x – 4 = x + 1
d) 2x + 1 = 145 i) 3x + 2 = x – 4
e) 2x + 15 = 49 j) 4x – 10 = 2x + 2

k) 3x – 25 = x + 55
l) 2x + 1 = 51
m) 2x + 4 = 150
n) 3x – 5 = 2x + 3
o) 4x + 2 = x – 4

Answer 1

a) 3x – 12 = 33

3x = 33 + 12

3x = 45

x = 45/3

x= 15

b) 2x = 21 – x

2x + x = 21

3x = 21

x = 21/3

x = 7

c) 2x + 9 = 79

2x = 79 - 9

2x = 70

x = 70/2

x = 35

d) 2x + 1 = 145

2x = 145 - 1

2x = 144

x = 144/2

x = 72

e) 2x + 15 = 49

2x = 49 - 15

2x = 34

x = 34/2

x = 17

f) 3x = 48 – x

3x + x = 48

4x = 48

x = 48/4

x = 12

g) 2x + 5 = 35

2x = 35 - 5

2x = 30

x = 30/2

x= 15

h) 2x – 4 = x + 1

2x - x = 1 + 4

x = 5

i) 3x + 2 = x – 4

3x - x = -4 - 2

2x = - 6

x = - 6 / 2

x = - 3

j) 4x – 10 = 2x + 2

4× - 2x = 2 + 10

2x = 12

x = 12 / 2

x = 6

k) 3x – 25 = x + 55

3x - x = 55 + 25

2x = 80

x = 80/2

x = 40

l) 2x + 1 = 51

2x = 51 - 1

2x = 50

x = 50/2

x = 25

m) 2x + 4 = 150

2x = 150 - 4

2x = 146

x = 146/2

x = 73

n) 3x – 5 = 2x + 3

3x - 2x = 3 + 5

x = 8

o) 4x + 2 = x – 4

4x - x = - 4 - 2

3x = - 6

x = - 6/ 3

x = - 2