Solve for x, y, z, a
a=-1
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3-y=7
Consider the second equation. Insert the known values of variables into the equation.
-y=7-3
Subtract 3 from both sides.
-y=4
Subtract 3 from 7 to get 4.
y=-4
Divide both sides by -1.
z=3-4
Consider the third equation. Insert the known values of variables into the equation.
z=-1
Subtract 4 from 3 to get -1.
a=-1
Consider the fourth equation. Insert the known values of variables into the equation.
x=3 y=-4 z=-1 a=-1
The system is now solved.
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