two containers, a and b begin with equal volumes of liquid 120ml is then poured from a to b container b now contains 5 times as much liquid as a find the volume of liquid left in container a
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B + 120 = 4(A - 120)
B + 120 = 4A - 480
Originally, A = B
Substitute:
B + 120 = 4B - 480
3B = 600
B = 200
A = 200
B + 120 = 320
A - 120 = 80
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