Solve for x, r
x=3
r=15
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x=3
Consider the first equation. Subtract 1 from 4 to get 3.
r-4=11
Consider the second equation. Swap sides so that all variable terms are on the left hand side.
r=11+4
Add 4 to both sides.
r=15
Add 11 and 4 to get 15.
x=3 r=15
The system is now solved.
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