Algebra 1

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

Chapter 1 - Foundations for Algebra - 1-8 An Introduction to Equation - Standardized Test Prep - Page 58: 67



Work Step by Step

Before finding the solution to all 4 equations, look at the equations to see if any appear to be unreasonable and determine whether that equation is false. Choice C seems to be unreasonable because you are adding two numbers that are greater than 50, but the given result is negative. Simplify the expression to determine whether C is true or false. $51-(-57)\overset?=-6\longrightarrow$ change subtraction to addition and reverse the sign $51+57\overset?=-6\longrightarrow$ add $108\ne-6\ \ X$
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