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Anonymous
4a + 3c - 2b - c + a - b = 5a - 3b + 2c
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(ab/b) / (4a/5b) =(ab / b) * (5b / 4a) = (5ab2 / 4ab)= 5 / (4b)
5ab-2ab+4a-b+5b = 3ab+4a+4b
4a + 3a = (4 + 3)a = 7a
3a * * * * * Actually, it is 4a.
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