Solve for x, y
y=20
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7x+4-3x=0
Consider the first equation. Subtract 3x from both sides.
4x+4=0
Combine 7x and -3x to get 4x.
4x=-4
Subtract 4 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-4}{4}
Divide both sides by 4.
x=-1
Divide -4 by 4 to get -1.
x=-1 y=20
The system is now solved.
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