A store owner spends 7x + 13 dollars on two orders of boxes of light bulbs, including shipping. If the store owner spent a total of $90 on both orders, how much does a box of light bulbs cost in dollars?
Question
Answer:
Well, I believe your equation would be...7x + 13 = 90
Now solve for x
Subtract 13 from each side
7x + 13 - 13 = 90 - 13
7x = 77
Divide each side by 7
7x ÷ 7 = 77 ÷ 7
x = 11
A box of light bulbs costs 11 dollars
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