Answer:
<h2>
<u>B.</u> <u>It must be a positive number since it represents a number of hours.</u></h2>
Step-by-step explanation:
I got it right on EDG.
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Simplifying
7h + -5(3h + -8) = -72
Reorder the terms:
7h + -5(-8 + 3h) = -72
7h + (-8 * -5 + 3h * -5) = -72
7h + (40 + -15h) = -72
Reorder the terms:
40 + 7h + -15h = -72
Combine like terms: 7h + -15h = -8h
40 + -8h = -72
Solving
40 + -8h = -72
Solving for variable 'h'.
Move all terms containing h to the left, all other terms to the right.
Add '-40' to each side of the equation.
40 + -40 + -8h = -72 + -40
Combine like terms: 40 + -40 = 0
0 + -8h = -72 + -40
-8h = -72 + -40
Combine like terms: -72 + -40 = -112
-8h = -112
Divide each side by '-8'.
h = 14
Simplifying
h = 14
