Answer: a) 7 b) -4 c) 15 d) -1 e) -8
Explanation:
7x + 9 = 58
-9 -9
7x = 49
÷7 ÷7
x = 7
x/2 - 12 = -14
+12 +12
x/2 = -2
×2 ×2
x = -4
-3x + 33 = -12
-33 -33
-3x = -45
÷-3 ÷-3
x = 15
8x + 16 = 8
-16 -16
8x = -8
÷8 ÷8
x = -1
2x - 2 = -18
+2 +2
2x = -16
÷2 ÷2
x = -8