Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 9 - Basic Algebra - 9.7 Solving Equations with Several Steps - 9.7 Exercises: 67

Answer

t =-3

Work Step by Step

-2t - 10 = 3t + 5 One way to get the variable term by itself on one side is to add 2t from both sides. -2t - 10 + 2t = 3t + 5 +2t -10 = 5t +5 Next, add -5 to both sides -10 -5= 5t +5 -5 -15 = 5t Finally, divide both sides by 5 $\frac{-15}{5}$ = $\frac{5t}{5}$ -3 = t The solution is -3. Check. Go back to the original equation -2t - 10 = 3t + 5 Replace t with -3 -2 * -3 -10 = 3* -3 +5 6 - 10 = -9 +5 -4 = -4 True, so -3 is the correct solution
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