Determine the value of dependent variables in the following line functions given the following values of the indenpendent variables
1. 3x-4y=12
2.x-y=15
3. 7x = 2y + 7
4.y= x + 7
5. y= 4x + 6
6. x+y -7 =3
7. 5x+2y =15
8.13x-5y = 18​