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Solve the system of equations

y=3x
x^2-y=28
Answered by Crystal
x=7 7*7-3*7=28
Answered by PsyDAG
Substitute 3x for y in the second equation and solve for x.

x^2 - 3x = 28
x(x-3) = 28

x = either 28 or 25

Use these value to solve for y in the first equation. Check by inserting values into the second equation.
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