Question

Find the value of the given variables.
3x + 6 = 12
10 + 4y = 22
10x - 10 = 30
3x - 5 = 13
6x + 11 = 65
8x - 6 = 18

Answer 1

Answer: (i.) 3x + 6 = 12

take 6 on the other side

3x = 12-6

3x = 6

take 3 on the other side

x = 6/3

x = 2

(ii.) 10 + 4y = 22

4y = 22 + 10

4y = 32

y = 32/4

y = 8

(iii.) 10x - 10 = 30

10x = 30 + 10

10x = 40

x = 40/10

x = 4

(iv.) 3x - 5 = 13

3x = 13 + 5

3x = 18

x = 18/3

x = 6

(v.) 6x + 11 = 65

6x = 65 - 11

6x = 54

x = 54/6

x = 9

(vi.) 8x - 6 = 18

8x = 18 + 6

8x = 24

x = 24/8

x = 3