Solve for x
x=450y+175
Solve for y
y=\frac{x-175}{450}
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0.04x=7+18y
Add 18y to both sides.
0.04x=18y+7
The equation is in standard form.
\frac{0.04x}{0.04}=\frac{18y+7}{0.04}
Multiply both sides by 25.
x=\frac{18y+7}{0.04}
Dividing by 0.04 undoes the multiplication by 0.04.
x=450y+175
Divide 7+18y by 0.04 by multiplying 7+18y by the reciprocal of 0.04.
-18y=7-0.04x
Subtract 0.04x from both sides.
-18y=-\frac{x}{25}+7
The equation is in standard form.
\frac{-18y}{-18}=\frac{-\frac{x}{25}+7}{-18}
Divide both sides by -18.
y=\frac{-\frac{x}{25}+7}{-18}
Dividing by -18 undoes the multiplication by -18.
y=\frac{x}{450}-\frac{7}{18}
Divide 7-\frac{x}{25} by -18.
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