6(3а+5)-7 упростить выражение
6(3а+5)-7=18a+30-7=18a+23
6(3а+5)-7=18а+30-7=18а+23
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6(3а+5)-7=18a+30-7=18a+23
6(3а+5)-7=18а+30-7=18а+23