Solve for x
x=\frac{y}{2}-\frac{31}{10}
Solve for y
y=2x+\frac{31}{5}
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10\left(x+4\right)-5\left(y-9\right)=54
Multiply both sides of the equation by 30, the least common multiple of 3,6,5.
10x+40-5\left(y-9\right)=54
Use the distributive property to multiply 10 by x+4.
10x+40-5y+45=54
Use the distributive property to multiply -5 by y-9.
10x+85-5y=54
Add 40 and 45 to get 85.
10x-5y=54-85
Subtract 85 from both sides.
10x-5y=-31
Subtract 85 from 54 to get -31.
10x=-31+5y
Add 5y to both sides.
10x=5y-31
The equation is in standard form.
\frac{10x}{10}=\frac{5y-31}{10}
Divide both sides by 10.
x=\frac{5y-31}{10}
Dividing by 10 undoes the multiplication by 10.
x=\frac{y}{2}-\frac{31}{10}
Divide -31+5y by 10.
10\left(x+4\right)-5\left(y-9\right)=54
Multiply both sides of the equation by 30, the least common multiple of 3,6,5.
10x+40-5\left(y-9\right)=54
Use the distributive property to multiply 10 by x+4.
10x+40-5y+45=54
Use the distributive property to multiply -5 by y-9.
10x+85-5y=54
Add 40 and 45 to get 85.
85-5y=54-10x
Subtract 10x from both sides.
-5y=54-10x-85
Subtract 85 from both sides.
-5y=-31-10x
Subtract 85 from 54 to get -31.
-5y=-10x-31
The equation is in standard form.
\frac{-5y}{-5}=\frac{-10x-31}{-5}
Divide both sides by -5.
y=\frac{-10x-31}{-5}
Dividing by -5 undoes the multiplication by -5.
y=2x+\frac{31}{5}
Divide -31-10x by -5.
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