Пошаговое объяснение:
1) 18х+30у+7х-5у=25х+25у=25(х+у)=25*3=75
2) 84а+3в-73а+8в=11а+11в=11(а+в)=11*7=77
3) 3m+35n+24m-8n=27m+27n=27(m+n)=27*4=108
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Пошаговое объяснение:
1) 18х+30у+7х-5у=25х+25у=25(х+у)=25*3=75
2) 84а+3в-73а+8в=11а+11в=11(а+в)=11*7=77
3) 3m+35n+24m-8n=27m+27n=27(m+n)=27*4=108