Solve for x, y
x=11
y=10
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y=3+7
Consider the second equation. Add 7 to both sides.
y=10
Add 3 and 7 to get 10.
x+2\times 10=31
Consider the first equation. Insert the known values of variables into the equation.
x+20=31
Multiply 2 and 10 to get 20.
x=31-20
Subtract 20 from both sides.
x=11
Subtract 20 from 31 to get 11.
x=11 y=10
The system is now solved.
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