Solve for x, y, z
z=5
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x\times 81+4x=-12
Consider the first equation. Multiply both sides of the equation by -4.
85x=-12
Combine x\times 81 and 4x to get 85x.
x=-\frac{12}{85}
Divide both sides by 85.
x=-\frac{12}{85} y=5 z=5
The system is now solved.
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