Solve for a, b, c, d
d=13
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c=20-2\times 8+3\times 3
Consider the third equation. Insert the known values of variables into the equation.
c=20-16+9
Do the multiplications.
c=4+9
Subtract 16 from 20 to get 4.
c=13
Add 4 and 9 to get 13.
d=13
Consider the fourth equation. Insert the known values of variables into the equation.
a=8 b=3 c=13 d=13
The system is now solved.
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