Приведите подобные слагаемые:
-7/12а+2/3а-2/3-1/4х;
0,18у-0,14у-0,23х+0,14у;
1/8р-1/4р+1/2р-3/4р;
3н+15м-2н+20м+7н-15м;
0,19н-0,87н-0,91н+0,87н;
-1/6х+1/3х+1/9х-1/2х-1/9х;
-3/4р-23/24-1/3р+23/24р;
-5а+12б-8а-13б+7а-12б;
4·(5-у)-30;
-8·(9+х)+50;
(-12)·(-а-2)-10;
20+3(х-15);
16-4(2+а)
Даю 15 баллов
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