Use the order of operations!
Parentheses (Purple)
Exponent (Elephants)
Multiply (Marching)
Divide (Down)
Add (A)
Subtract (Street)
Slope y-intercept form is: y=mx+b
All you have to do is rearrange the equation:
2x-3y=6
2x=6+3y
2x-6=3y
now divide both sides by 3
(2x/3)-(6/3)=(3y/3)
and it becomes

x
Bonus: you can plug in any two values for x and y and you can see both equation gives the same answer!
16...................................
Answer:
I don't know the answer bud
For number 2 it's would be 12.8
Sorry I don't have time for number 3