SOLUTION: 3x - 12 = 15

Question 17054: 3x - 12 = 15
Found 2 solutions by tjnw79, lenny460:
Answer by tjnw79(57) (Show Source): You can put this solution on YOUR website!
3x-12=15
plus 12 on both side
3x+(12)-12=15+(12)
3x=27
divide by 3 on both sides
x=9
Answer by lenny460(1073) (Show Source): You can put this solution on YOUR website!
3x - 12 = 15
Add 12 to each side of the equation.
3x - 12 + 12 = 15 + 12
Combine like terms:
-12 + 12 = 0
15 + 12 = 27
Therefore:
3x = 27
Divide each side by 3
3x/3 = 27/3
x = 9

Answer:
x = 9

Lennox Obuong
Algebra Tutor
Nairobi, Kenya
Email: lennoxobuong@yahoo.com
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