а) 24 * (z+9) = 288

б) 44 : z + 9 = 20

24 * (z+9) = 288 z+9= 288 : 24z+9=12z=12-9z=3проверка 24*(3+9)=28824*12=288288=28844 : z + 9 = 20 44 : z = 20-944 : z = 11z=44:11z=4проверка44:4 + 9 = 2011 + 9 = 20 20 = 20

a) 24×z+24×9=288 24z+216=288 24z=288-216 24z=72 Z=3