Solve for x, y, z, a
a=15
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z=3\times 5
Consider the third equation. Insert the known values of variables into the equation.
z=15
Multiply 3 and 5 to get 15.
a=15
Consider the fourth equation. Insert the known values of variables into the equation.
x=3 y=5 z=15 a=15
The system is now solved.
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