Question: Make the given changes in the indicated examples of this section and then solve the resulting problems. In Example 4, change 2t 7 to

Make the given changes in the indicated examples of this section and then solve the resulting problems.

In Example 4, change 2t − 7 to 7 − 2t and then solve.

Data from Example 4

Solve the equation 2t − 7 = 9.
We are to perform basic operations to both sides of the equation to finally isolate t on one side. The steps to be followed are suggested by the form of the equation.

2t - 7 = 9 2t - 7+7= 9+7 2t = 16

Therefore, we conclude that t = 8. Checking in the original equation, we have

2t - 7 = 9 2t - 7+7= 9+7 2t = 16 21 16 2 2 t = 8

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