Question

1.) 7x+9=23

2.) 5x+7=42
3.) 4x+3=51
4.) 9x+5=41
5.) 4x+2=34
6.) 11x+3=36

Answer 1

1) x = 2

2) x = 7

3) x = 12

4) x = 4

5) x = 8

6) x = 3

Explanation:

1) 7x + 9 = 23

(7x + 9) + (-9) = 23 + (-9)

7x + 9 - 9 = 23 - 9

7x = 14

7x/7 = 14/7

x = 2

2) 5x + 7 = 42

(5x + 7) + (-7) = 42 + (-7)

x = 7

3) 4x+3=51

(4x + 3) + (-3) = 51 + (-3)

4x + 3 - 3 = 51 - 3

x = 12

4) 9x+5=41

(9x + 5) + (-5) = 41 + (-5)

x = 4

5) 4x+2=34

(4x + 2) + (-2) = 34 + (-2)

x = 8

6) 11x+3=36

(11x + 3) + (-3) = 36 + (-3)

11x + 3 - 3 = 36 - 3

x = 3