Julia spent $60 on a book. the cost of the book was $24 less than twice what she spent on a backpack. how much did the backpack cost?

Cost of the book = $60
Let the cost of the backpack be x
According to the question,
2x - 24 = 60
2x = 60 + 24 = 84
x = 84/2 = 42
The cost of the backpack = $42

I HOPE IT IS HELPFUL:D

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answer:
congruent segments
step-by-step explanation:
congruent segments. take a line, cut it in half, superipose one half over the other half; you'll have congruence.