10-(3 5/11 + 1 8/11)+4 2/11=10- (38/11+19/11)+ 46/11=10/1-19/11+46/11= (110 - 19+46)/11=137/11=12 целых 5/11
2. НОК(480;216;144) = 2*2*2*2*3*3*3*2*5 = 4 320
480 2 216 2 144 2
240 2 108 2 72 2
120 2 54 2 36 2
60 2 27 3 18 2
30 2 9 3 9 3
15 3 3 3 3 3
5 5 1 1
1
1)0,7х-(2у-0,7х)=0,7х-2у+0,7х=1,4х-2у
2)2/3(m-3n)+1/3(n-2m)=2/3m-2n+1/3n-2/3m=-1 2/3n
3)3(c+d)-7(d+2c)=3c+3d-7d-14c=-11c-4d