Răspuns:
Explicație pas cu pas:
b = 8 x a
b - a = 63
__________
a = ?
b = ?
___________
a ____
b ____ ____ ____ ____ ____ ____ ____ ____
<__________63_________________>
7 segmente = 63 gutui
1 segment = 63 : 7 = 9 gutui
a = 9 gutui
b = 8 x 9 = 72 gutui