2 72 2 72 2 72·1 2 ·20 72 40 3.72 + ---=3 ------ + ---= 3 + -----+ ---- = --------- +--------- = 3+ ---- + ------=
5 100 5 100 5 100·1 5·20 100 100
70+40 112 28·4 28 3 + 1·25 3
=3 -------- = 3 -------- = 3----------= 3 ------ =3 ------------- =4-----=4.12
100 100 25·4 25 25 25
я только один сделала
№ 537
1) 2 1/36 = 2 1/36 и 3 8/9 = 3 32/36
2) 1 3/4 = 1 9/12 и 3 5/12 = 3 5/12
3) 4 2/7 = 4 6/21 и 5 4/21 = 5 4/21
4) 1 7/20 = 1 35/100 и 2 3/50 = 2 6/100
5) 1 3/11 = 1 6/22 и 2 1/2 = 2 11/22
6) 6 7/100 = 6 7/100 и 4 9/10 = 4 90/100
2+у=5+у
0у=3 - решений нет