Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - 5-3 Slope-Intercept Form - Mixed Review - Page 312: 84



Work Step by Step

We start with the given equation: $21=-2t+3$ We subtract $3$ from both sides of the equation: $21-3=-2t+3-3$ We combine like terms: $18=-2t$ Finally, we divide by $-2$ on both sides of the equation: $t=\frac{18}{-2}=-9$
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