Решить кто сколько сможет. СРОЧНООО
№7 5,2t+1.8(t-60)=5.2t+1.8t-108=7t-108=7*(-3.1)-108=-21.7-108=-129.7 3.3(13t-2)-4.68=42.9t-6.6t-4.68=36.3t-4.68=36.3*4.6-4.68=166.98-4.68=162.3
№6 s-(s-(6s-11))=s-(s-6s+11)=s-s+6s-11=6s-11
3b-((10x-12b)+2x)=3b-(10x-12b+2x)=3b-10x+12b-2x=-14x+9b
3y-(7y-(3y-(3y+2)))=3y-(7y-(3y-3y-2)=3y-(7y-3y+3y+2)=3y-7y+3y-3y-2=-4y-2
11n-(9n-((m-5m)-2m))=11n-(9n-m+5m-2m)=11n-9n+m-5m+2m=2n-2m=2(n-m)