Solve for z
z=-x\left(6x-13\right)
Solve for x
x=\frac{\sqrt{169-24z}+13}{12}
x=\frac{-\sqrt{169-24z}+13}{12}\text{, }z\leq \frac{169}{24}
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-13x+z=-6x^{2}
Subtract 6x^{2} from both sides. Anything subtracted from zero gives its negation.
z=-6x^{2}+13x
Add 13x to both sides.
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