Solve for x
x=-\frac{5y}{3}+7
Solve for y
y=\frac{21-3x}{5}
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30000x+50000y=210000
Swap sides so that all variable terms are on the left hand side.
30000x=210000-50000y
Subtract 50000y from both sides.
\frac{30000x}{30000}=\frac{210000-50000y}{30000}
Divide both sides by 30000.
x=\frac{210000-50000y}{30000}
Dividing by 30000 undoes the multiplication by 30000.
x=-\frac{5y}{3}+7
Divide 210000-50000y by 30000.
30000x+50000y=210000
Swap sides so that all variable terms are on the left hand side.
50000y=210000-30000x
Subtract 30000x from both sides.
\frac{50000y}{50000}=\frac{210000-30000x}{50000}
Divide both sides by 50000.
y=\frac{210000-30000x}{50000}
Dividing by 50000 undoes the multiplication by 50000.
y=\frac{21-3x}{5}
Divide 210000-30000x by 50000.
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