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Автор - PrankBr0

упростите выражение 11-7(2а-3б)+(6а-9б) при а= -5 б=4

Ответ

Автор - sashsaotl
11-7(2а+3б)+(6а-9б)=11-14а-21б+6а-9б=11-8а-30а=
/а=-5;б=4/=11-8*(-5)-30*4=11+40-120=51-120=-69

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