Question

Adam was collecting bonus points toward a prize. The first and second weeks he earned

15 points each. The third and fourth weeks he earned 21 points each. When he turned in
his points on the last week, he found that 5 of the points weren't valid. How many points
did he receive credit for altogether?​

Answer 1

67 points

Explanation:

`(15 + 15) + (21 + 21) + - 5 \\ 30 + 42 - 5 \\ 67`

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