Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
1. Solving One-Step Equations
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Exercise 14 Page 85

How can you isolate f on one side?

f=11

Practice makes perfect
To solve the equation, we have to isolate f on one of the sides. By subtracting 9 from both sides, we can cancel out 9 on the left-hand side and isolate f.
f+9=20
f+9-9=20-9
f=11
Therefore, f=11 is the solution to the equation. We can check our answer by substituting f=11 into the original equation and simplifying.
f+9=20
11+9? =20
20=20
Since both sides are equal, f=11 is the correct solution.