October 2021 0 15 Report
9+2(3а-4),  5б+4(б-7),  16+8(5-с),  29+7(2-3а),  15а+2(9-2а),  23а+4(5а-3)    Образец:9а+4(5-2а)=9а+20-8а=(9-8)а+20=а+20.
ПОМОГИТЕ!ЗАРАНЕЕ СПАСИБО!!!!!!!!!!!!!Я НЕ МОГУ РЕШИТЬ!!!!!!
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