5 3/7 - (d - 2 1/7) = 2 4/7 (270 : y -12) * 70 = 1260 решите пжпжпжпж

Question

5 3/7 - (d - 2 1/7) = 2 4/7

(270 : y -12) * 70 = 1260

решите пжпжпжпж

Answer 1

5 3/7-d+2 1/7=2 4/7
-d=2 4/7-2 4/7-5 3/7
d=5 3/7

(270/у-12)=1260/70
270/у-12=18
270/у=30
у=9

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