Find the unit rate of the previous two. use that to plug in 700
3n-5=7
The three times a number goes first because there is the “less than” phrase.
Explanation:
First you had to square from both sides of equation form.

Then you expanded form.



Solve by equation form.

Add by four from both sides of equation form.

Simplify.

Verified solutions.

Final answer: 
Hope this helps!
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-Charlie
785.63-(57+125)
=785.63-182
=603.63
603.63+57.25=$660.87