Răspuns :
x + y = 45
x : y = 5 rest 3 ⇒ x = 5y + 3
~
x, y =?
~
5y + 3 + y = 45 /-3
6y = 42 /:6
y = 7
x = 5y + 3
x = 35 + 3 = 38
/robertinni
x : y = 5 rest 3 ⇒ x = 5y + 3
~
x, y =?
~
5y + 3 + y = 45 /-3
6y = 42 /:6
y = 7
x = 5y + 3
x = 35 + 3 = 38
/robertinni
x + y = 45
x : y = 5 rest 3 ⇒ x = 5y + 3
⇔
5y + 3 + y = 45
x=5y+3
⇔
6y+3=45
x=5y+3
⇔
6y=42
x=5y+3
⇔
y=7
x=5×7+3
⇔
x=38
y=7
x : y = 5 rest 3 ⇒ x = 5y + 3
⇔
5y + 3 + y = 45
x=5y+3
⇔
6y+3=45
x=5y+3
⇔
6y=42
x=5y+3
⇔
y=7
x=5×7+3
⇔
x=38
y=7