Solve for a, b, c, d
d=21
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c=-5\left(-3\right)-2\left(-3\right)
Consider the third equation. Insert the known values of variables into the equation.
c=15+6
Do the multiplications.
c=21
Add 15 and 6 to get 21.
d=21
Consider the fourth equation. Insert the known values of variables into the equation.
a=-5 b=-3 c=21 d=21
The system is now solved.
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