Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
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Exercise 47 Page 155

You can solve for the variable by using the Cross Product Property.

21

Practice makes perfect

To solve the proportion, we will use the Cross Product Property.

3/- 7 = - 9/t
3t = -7(-9)
3t=63
3t/3=63/3
t=21