Pearson Algebra 1 Common Core, 2011
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Pearson Algebra 1 Common Core, 2011 View details
5. Literal Equations and Formulas
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Exercise 16 Page 112

Isolate y on the left-hand side of the equation, then substitute the values for x.

Equation: y=4-7x/2

x y
5 - 31/2
10 - 33
15 - 101/2
Practice makes perfect
Let's begin by solving the equation for y.
2y+7x=4
2y+7x-7x=4-7x
2y=4-7x
2y/2=4-7x/2
y=4-7x/2
To find the value of y for each of the x-values, we substitute them into the equation and evaluate.
x 4-7x/2 y
5 4-7( 5)/2 -31/2
10 4-7( 10)/2 -33
15 4-7( 15)/2 - 101/2