7y+19y-2y-27,5=50,74
24y-27,5=50,74
24y=50,74+27,5
24y=78,24
y=3,26
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7y+19y-2y-27,5=50,74
24y-27,5=50,74
24y=50,74+27,5
24y=78,24
y=3,26