Question
Jun Wei had 40 more marbles than Joe at first. After joe had given Jun Wei 10 marbles, Jun Wei had 5 times as many marbles as Joe. How many marbles did joe have at first?
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Answer to a math question Jun Wei had 40 more marbles than Joe at first. After joe had given Jun Wei 10 marbles, Jun Wei had 5 times as many marbles as Joe. How many marbles did joe have at first?
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4.6106 Answers
x = Jun Wei's marbles
y = Joe's marbles
x = y + 40
(x + 10) = 5(y - 10)
(y + 40 + 10) = 5(y - 10)
y + 50 = 5y - 50
y - 5y = -50 - 50
-4y = -100
y = -100/-4
y = 25
answer:
25
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