6(3x-7)-8•(4х+5)-(18-14х) =-10018x-42-32x-40-18+14x=-10018x-32x+14x-42-40-18=-100-14x+14x-82-18=-100-100=-100Доведено
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6(3x-7)-8•(4х+5)-(18-14х) =-100
18x-42-32x-40-18+14x=-100
18x-32x+14x-42-40-18=-100
-14x+14x-82-18=-100
-100=-100
Доведено