Solve for y, z, a
a=4
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y-21+12\times 8=63
Consider the first equation. Multiply 3 and 7 to get 21.
y-21+96=63
Multiply 12 and 8 to get 96.
y+75=63
Add -21 and 96 to get 75.
y=63-75
Subtract 75 from both sides.
y=-12
Subtract 75 from 63 to get -12.
y=-12 z=4 a=4
The system is now solved.
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