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lexa92
@lexa92
July 2022
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нужно упростить выражение.
2/3(6.9c-1 1/2d)-4.8(5/8c-2.5d)
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Gor4itza
Verified answer
2/3(6.9c-1 1/2d)-4.8(5/8c-2.5d)=1.6c+11d
1)2/3*6.9c-2/3*1 1/2d=2/3*69/10c-2/3*3/2d=23/5c-d=4.6c-d
2)-4.8*5/8c+4.8*2.5d=-48/10*5/8c+12d=-3c+12d
3)4.6c-d-3c+12d=1.6c+11d
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2/3(6.9c-1 1/2d)-4.8(5/8c-2.5d)=1.6c+11d1)2/3*6.9c-2/3*1 1/2d=2/3*69/10c-2/3*3/2d=23/5c-d=4.6c-d
2)-4.8*5/8c+4.8*2.5d=-48/10*5/8c+12d=-3c+12d
3)4.6c-d-3c+12d=1.6c+11d