Solve for x
x=\frac{100y-13500}{7}
Solve for y
y=\frac{7x}{100}+135
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0.07x+135=y
Swap sides so that all variable terms are on the left hand side.
0.07x=y-135
Subtract 135 from both sides.
\frac{0.07x}{0.07}=\frac{y-135}{0.07}
Divide both sides of the equation by 0.07, which is the same as multiplying both sides by the reciprocal of the fraction.
x=\frac{y-135}{0.07}
Dividing by 0.07 undoes the multiplication by 0.07.
x=\frac{100y-13500}{7}
Divide y-135 by 0.07 by multiplying y-135 by the reciprocal of 0.07.
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