July 2022 2 6 Report
Упростите выражение а) b - a + b + a , б) x - y - z + y , в) c - 10 +15 - c , г) x + y + x +x - y , д) x +x - 15 +15 , е) a - 1 + a - 1 + a - 1 , ж) a - 3 + b + 3 , з) m + m + 1 + m - 20 .
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