Solve for n
n=4x+25
Solve for x
x=\frac{n-25}{4}
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n-7-4x=18
Use the distributive property to multiply -4 by 1.75+x.
n-4x=18+7
Add 7 to both sides.
n-4x=25
Add 18 and 7 to get 25.
n=25+4x
Add 4x to both sides.
n-7-4x=18
Use the distributive property to multiply -4 by 1.75+x.
-7-4x=18-n
Subtract n from both sides.
-4x=18-n+7
Add 7 to both sides.
-4x=25-n
Add 18 and 7 to get 25.
\frac{-4x}{-4}=\frac{25-n}{-4}
Divide both sides by -4.
x=\frac{25-n}{-4}
Dividing by -4 undoes the multiplication by -4.
x=\frac{n-25}{4}
Divide 25-n by -4.
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