Explanation:
1) x + 18 = 30
Subtract 18 on both sides.
x = 12
2) x - 26 = 41
Add 26 on both sides.
x = 67
3) 3x = 42
Divide both sides by 3.
x = 14
4) x/5 = 11
Multiply both sides by 5.
x = 55
5)77 = -7x
Divide both sides by -7.
x = -11
6)-65 = x - 38
Add 38 to both sides.
x = 27
7) -13 = x/8
Multiply both sides by 8.
x = -104
8) 19 = x + 76
To have x by itself on one side, subtract 76 from both sides.
x = -57
9) x/16 = 14
To get x by itself, multiply both sides by 16. This will get rid of 16 from the denominator.
x = 224
10) x - 99 = 35
Add 99 on both sides.
x = 134
11)-21 = -x/11
Multiply both sides by -11.
x = 231
12)-345 = 15x
Divide both sides by 15.
x = -23
13) x + 79 = 275
Subtract 79 on both sides.
x = 196
14) -12x = -444
Divide both sides by -12.
x = 37