Răspuns :
a+b=41
a-b=5
a+b+a-b=41+5
2a=46
a=46:2
a=23 ani are un frate
b=41-23=18 ani are celalalt
a-b=5
a+b+a-b=41+5
2a=46
a=46:2
a=23 ani are un frate
b=41-23=18 ani are celalalt
x+y =41
x =11
y =6
11 -6 =5
x/____/+5
y/____/
41 -5 =36
36 /2 =18
y =18
x=18 +5 =23
x =11
y =6
11 -6 =5
x/____/+5
y/____/
41 -5 =36
36 /2 =18
y =18
x=18 +5 =23