6а-4а=2а
10а+3а+2а=15а
9р+20р+8р=37р
12х-10у=2(6х-5у)
2+5х+3+5х=5+10х
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6а-4а=2а
10а+3а+2а=15а
9р+20р+8р=37р
12х-10у=2(6х-5у)
2+5х+3+5х=5+10х