Question

x+y=45 stiind ca x=5y+3 determinati x,y

Answer 1

5y+3+y=45
6y=45-3
y=42:6
y=7
x=5x7+3
x=38

Answer 2

x = 5y + 3 => 5y + 3 + y=45
5y + y + 3= 45
6y =45-3
6y= 42
y=42:6
y=7