1) 18q-6r q=-5/6 r=17/18
18*(-5/6)-6*(17/18)=-15-17/3=-62/3=-20*2/3
2)8-0.2t and 8+0.2t t=4
8-0.2*4=7.2 8+0.2*4=8.8
7.2 > 8.8
3) 8b-6u-6b+5u=2b-1u 8(11p-9)-10=88p-72-10=88p-82
7s-(s+8)+(11s-6)=7s-s-8+11s-6=17s-14
4) -6(1.8s-5.5)-17.2s-6 s=-1/5
-10.8s+33-17.2s-6=-28s+27=5.6+27=32.6
5)-
6)9g-(7g-(2g-n))=9g-(7g-2g+n)=9g-5g-n=4g-n