Solve for x, y
x=7
y=0
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3\times 7+y=21
Consider the first equation. Insert the known values of variables into the equation.
21+y=21
Multiply 3 and 7 to get 21.
y=21-21
Subtract 21 from both sides.
y=0
Subtract 21 from 21 to get 0.
x=7 y=0
The system is now solved.
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