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Example 8.22 from Prealgebra, 8.3 Solve Equations with Variables and Constants on Both Sides
Solve Equations with Variables and Constants on Both Sides: example 8.22
Solve:
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
Here the variable, is on both sides, but the constants appear only on the right side, so let’s make the right side the “constant” side. Then the left side will be the “variable” side.
We don't want any variables on the right, so subtract the . Simplify. We have all the variables on one side and the constants on the other. We have solved the equation. Check: Substitute 7 for .
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Solve:
How did it go?