Solve for f
f=\frac{23}{29}\approx 0.793103448
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20f=11f+23-20f
Combine f and -f\left(-19\right) to get 20f.
20f=-9f+23
Combine 11f and -20f to get -9f.
20f+9f=23
Add 9f to both sides.
29f=23
Combine 20f and 9f to get 29f.
f=\frac{23}{29}
Divide both sides by 29.
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