College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.1: 3


Evaluate the expression for the given values of the variables: $6x-y$, for $x=3$ and $y=8$ $=6(3)-8$ $=18-8$ $=10$

Work Step by Step

To evaluate an expression for a given value, substitute the given value for the variable in the expression and then solve. For this problem, substitute 3 for the 'x' and 8 for the 'y'. As the 'x' is right next to the number 6, it is implied that the two are multiplied together. The order of operations indicates that multiplication comes before subtraction, so first multiply the 6 and 3, then subtract 8 from the product.
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