SOLUTION: 3x+7x-5=15 what is x alone?

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Question 546519: 3x+7x-5=15 what is x alone?
Answer by nerdybill(5866) About Me  (Show Source):
You can put this solution on YOUR website!
3x+7x-5=15
add 5 to both sides:
3x+7x-5 +5 = 15 +5
3x+7x = 20
10x = 20
divide both sides by 10:
x = 2