А) 8*(36-x:4)=240 б) 540:(y+12)-9=18
A)36-x:4=240:8 б)(y+12)-9=540:18 36-x:4=30 (y+12)-9=30 x:4=36-30 (y+12)=30+9 x:4=6 (y+12)=39 x=6*4 y=39-12 x=24 y=27