Solve for r, s, t, u
u=-12
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t=3\times 6-6\times 5
Consider the third equation. Insert the known values of variables into the equation.
t=18-6\times 5
Do the multiplications.
t=18-30
Multiply -6 and 5 to get -30.
t=-12
Subtract 30 from 18 to get -12.
u=-12
Consider the fourth equation. Insert the known values of variables into the equation.
r=6 s=5 t=-12 u=-12
The system is now solved.
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