Question 61103: Is 15 a solution to the equation 8 – x = 7 and how can i explain my answer?
Answer by tutorcecilia(2152)   (Show Source):
You can put this solution on YOUR website! Plug-in the value to see:
8 – x = 7
Let x=15
So, 8-(15)= -7
so, 15 is not a solution because when you substitute 15 for x, the answer is -7, not 7.
The correct solution is:
8-x=7 [solve for x]
-x=7-8
-x=-1
So, x=1 is the solution.
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