Решите уравнения: а) 15/(7-y) = 5 б) 42/y = 3 в) (12+y)/9 = 3 г) (14+х )/9 = 5 д) y - 13/27 = 10/27 е) 4 1/5 + x = 7 4/5 ж) (8/15 + x) - 7/15 = 11/15 з) x/42 - 5/42 = 35/42
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2)(245-80):11=15
3)150:(5*6)=5
5)(15-12)*(84:6)=42
6)(343:7)+(15*5)=124
б) y = 14
в) 12+y = 27; y = 15
г) 14+x = 45; x = 31
д) y = 23/27
е) x = 3 3/5
ж) 8/15+x = 18/15; x = 10/15; x = 2/3
з) x/42 = 40/42; x = 40/42 * 42; x = 40