SOLUTION: What does it mean when you have a sum, say for instance: y=2x+10 and it asks you what the value of x is? Test Paper Question

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Question 145465: What does it mean when you have a sum, say for instance: y=2x+10 and it asks you what the value of x is?
Test Paper Question
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x+10 and it asks you what the value of x is?
:
I think it means you should solve for x, write it this way:
2x + 10 = y
:
Subtract 10 from both sides
2x = y - 10
:
Divide both sides by 2:
x = %28%28y-10%29%29%2F2