Answer:
1) x = 2
2) x = 7
3) x = 12
4) x = 4
5) x = 8
6) x = 3
Step-by-step 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
