1)x:24=c1 rest 11
x=24c1 +11
x=M₂₄ +11
x∈N
x-cel mai mic =>x=24+11=35
y:36=c2 rest 22
y=36c2 +22
y=M₃₆ +22
y∈N
y-cel mai mic =>y=36+22=58
x:12=35:12=2 rest 11
y:12=58:12=4 rest 10
b)(2x+3y):72= (2*35+3*58):72= (70+174):72= 244:72= 3 rest 28
c)15*x+5*y= 15*35 +5*58= 525 +290 =815= (......5)