Solve for y, z, a
a=3
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2y=7-4
Consider the first equation. Subtract 4 from both sides.
2y=3
Subtract 4 from 7 to get 3.
y=\frac{3}{2}
Divide both sides by 2.
y=\frac{3}{2} z=3 a=3
The system is now solved.
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