72=2*2*2*9
a13.7b
a+1+3+7+b=9m
a+b+2=9(m-1) m=2,3,4.
b=2 a=5 513.72/72
b=4 a=3 313.74/72
b=6 a=1 113.76/72=1.58
b=8 a=8 813.78/72
b=0 a=7 713.7/72
113.76
72=2*2*2*9
a13.7b
a+1+3+7+b=9m
a+b+2=9(m-1) m=2,3,4.
b=2 a=5 513.72/72
b=4 a=3 313.74/72
b=6 a=1 113.76/72=1.58
b=8 a=8 813.78/72
b=0 a=7 713.7/72
113.76