Question

найдите значения выражения: 0,7(3m+2n)-1,1n при 7m+n=4,7

Answer 1

 0.7(3m+2n)-1.1n=2.1m+1.4n-1.1n=2.1m+(1.4-1.1)n=2.1m+0.3n=0.3(7m+n)=0.3*4.7=1.41

Answer 2

при 7m+n=4,7:

0.7(3m+2n)-1.1n=0.7*3m+0.7*2n-1.1n=2.1m+1.4n-1.1n=2.1m+0.3n=0.3*(7m+n)=0.3*4.7=1.41