Solve for y
y=-\frac{5x}{2}+100
Solve for x
x=-\frac{2y}{5}+40
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0.4y=40-x
Subtract x from both sides.
\frac{0.4y}{0.4}=\frac{40-x}{0.4}
Divide both sides of the equation by 0.4, which is the same as multiplying both sides by the reciprocal of the fraction.
y=\frac{40-x}{0.4}
Dividing by 0.4 undoes the multiplication by 0.4.
y=-\frac{5x}{2}+100
Divide 40-x by 0.4 by multiplying 40-x by the reciprocal of 0.4.
x=40-0.4y
Subtract 0.4y from both sides.
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