1) 5a-11=44 5a=44+11 5a=55 a=11
2) (x+24)+53=930 x+24+53=930 x=930-53-24 x=853
3) 34-x+23=27 -x=27-23-34 -x=-38 x=38
4) 35+(x-17)=35 x=35-35-17 x=-17
5) 64-(15+x)=28 x=28+15-64 x=21
6)
7)8*(a-35)=208 8a-280=208 8a=208+280 8a=488 a=61
8) 180:(x-12)=20 180:20=x-12 x-12=9 x=9+12 x=21
9) (a+43):9=747 747:9=a+43 a+43=83 a=83-43 a=40