Money Word Problem \ stacker news ~science

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It's correct?

Bag A contains x coins, Bag B cointains y coins:

y = x + 31

0.5 * x = 0.2 * y + 11.20

Insert the former into the latter

0.5 * x = 0.2 * (x + 31) + 11.20

0.5 * x = 0.2 * x + 6.2 + 11.20

0.3 * x = 17.4

x = 58, y = 89

Yes, well done!