SOLUTION: How can you use y=43+5x to solve 78=43+5x?

Question 571830: How can you use y=43+5x to solve 78=43+5x?
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
We can set this y=43+5x 78=43+5x up as:
78=43+5x
Subtract 43 from each side:
35=5x
Now we could substitute this into the first equation:
y=43+35
Add and we get:
y=78
Or, a quicker way is substitute 43+5x into the first and we get:
y=78
Make sense?
RJ
www.math-unlock.com
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