Solve for q, r, s
r=3
s=5
q=1
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q=7\times 3-4\times 5
Consider the first equation. Insert the known values of variables into the equation.
q=21-20
Do the multiplications.
q=1
Subtract 20 from 21 to get 1.
q=1 r=3 s=5
The system is now solved.
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