SOLUTION: An arithmetic student needs at least a 70% average to receive credit for the course. If she scored 86%, 77%, and 64% on the first three exams, what is the lowest score she can get

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Question 266755: An arithmetic student needs at least a 70% average to receive credit for the course. If she scored 86%, 77%, and 64% on the first three exams, what is the lowest score she can get on the fourth exam to receive credit for the course?
Answer by peekaboo0501(13) About Me  (Show Source):
You can put this solution on YOUR website!
86+77+64+x = 70 x 4
x = 280 - 227
x = 63