Solve for x, y, z, a
a=187.5
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y=7.5\left(3\times 7+4\right)
Consider the second equation. Insert the known values of variables into the equation.
y=7.5\left(21+4\right)
Multiply 3 and 7 to get 21.
y=7.5\times 25
Add 21 and 4 to get 25.
y=187.5
Multiply 7.5 and 25 to get 187.5.
z=187.5
Consider the third equation. Insert the known values of variables into the equation.
a=187.5
Consider the fourth equation. Insert the known values of variables into the equation.
x=7 y=187.5 z=187.5 a=187.5
The system is now solved.
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