Part-time workers

Three part-time workers received CZK 1,235 for their work. The first received 20% less than the second and the third received 45 CZK more than the second. Determine how many crowns (CZK) each of them received.

Correct result:

a =  340
b =  425
c =  470


a = b-0.20b
c = 45 + b

a = b-0.20•b
c = 45 + b

a+b+c = 1235
a-0.8b = 0
b-c = -45

a = 340
b = 425
c = 470

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