Răspuns :
a + b = 100
a : b = 2 rest 10
a = 2b + 10
2b + 10 + b = 100
3b = 100 - 10
3b = 90
b = 90 : 3
b = 30
a = 2 x 30 + 10
a = 60 + 10
a = 70
a : b = 2 rest 10
a = 2b + 10
2b + 10 + b = 100
3b = 100 - 10
3b = 90
b = 90 : 3
b = 30
a = 2 x 30 + 10
a = 60 + 10
a = 70
a+b=100
a:b=2 r10 =>a=2b+10
2b+10+b=100
3b+10=100
3b=100-10
3b=90
b=90÷3
b=30
a=30*2+10
a=70
a:b=2 r10 =>a=2b+10
2b+10+b=100
3b+10=100
3b=100-10
3b=90
b=90÷3
b=30
a=30*2+10
a=70