C+14c=15c
14+1=15
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36 целых 30/70 = 36 целых 3/7 = (36*7+3)/7 = 255/7
1,2 = 12/10 = 6/5
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36 целых 30/70 * 1,2 = 255/7 * 6/5 = (51*6)/(7*1) = 306/7 = 43 целых 5/7
Ответ: 43 целых 5/7.
3/7(0.56-4.9у)-6/13(0.52-3.9у)=0.6
0.24-2.1у-0.24+1.8у=0.6
-2.1у+1.8у=0.6
-0.3у=0.6
у=0.6:(-0.3)
у=-2
ОТВЕТ: -2
(x-3)(x+3)/(x-3)= x+3=3+3=6