Find x if f(x) = 2x + 7 and f(x) = -1.
2 answers:
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First, set up a ratio: 
The first fraction is the percentage (30% and
are the same thing) and the second is the loan payment (which is equal to the 30 in the first fraction) over their annual income (
).
First you divide $15,680 by 30, then multiply that quantity by 100. The value calculated then replaces in your second fraction: 
The first fraction is the percentage (30% and
First you divide $15,680 by 30, then multiply that quantity by 100. The value calculated then replaces