Question

a÷b=3 r 5 si a-b=25va multumesc

Answer 1

a:b=3 r 5=>a=3b+5
a-b=25
inlocuim
3b+5-b=25
2b=25-5
2b=20
b=20:2
b=10
a=3b+5
a=3x10+5=30+5
a=35
proba
35:10=3 r 5
a-b=35-10=25

Answer 2

a:b=3 r5=>a=3•b+5
3•b+5-b=25
2•b+5=25
2•b=20
b=10