Buna! :D
a) {a,b} d.p. {2,22}
a/2=b/22
7/2=b/22
2b=7*22
2b=154
b=154:2=77
b) . {a,b} d. p. {2,22}
12*a=2*b
b=a+30 . |*2
2b=2*a+60
12a=2a+60
12a-2a=60
10a=60
a=60:10=6
b=2*6+60=12+60=72
