задали контролку а я болел задания такие
1 Приведите подобные слагаемые
а 3x+15y-2-y+0.5x-15
б -13a+1.5y-2a-y+a-0.5y-15+a
в -1.3a+0.5y-1.2a-0.5y-a-0.5y-15+a
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