Algebra 1

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

Chapter 2 - Solving Equations - 2-8 Proportions and Similar Figures - Mixed Review: 39

Answer

$x=1.5$

Work Step by Step

Let x be the unknown number. Convert each word phrase into its algebraic equivalent. If you add a certain number to 3 $\ \ \longrightarrow$ $x+3$ the result is the same as if you had $\longrightarrow$ = multiplied the number by 3 $\ \ \ \ \ \ \ \ \ \ \,\longrightarrow$ $3x$ Solve the equation. $x+3=3x\longrightarrow$ subtract x from each side $x+3-x=3x-x\longrightarrow$ subtract $3=2x\longrightarrow$ divide each side by 2 $3\div2=2x\div2\longrightarrow$ divide $1.5=x$
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