Math question! Writing equations in standard form

Standard form is this:
Ax + By = C
A B and C stand for different values
The rules for standard form are:
The greatest common factor of A B and C is 1. 9x + 3y = 6 -> divide each side by 3 -> 3x + (1)y = 2
A is greater than 0. -3x + 2y = -5 -> multiply each side by -1 -> 3x - 2y = 5
A and B are not both 0.
A B and C are integers (no fractions).

To turn an equation from another form to standard form, try to get both variables on the same side.
Ex:
y = 5 - 2x add 2x to both sides
2x + y = 5

More complex ex:
y = 2(7x - 14) distributive property
y = 14x - 28 subtract 14x from both sides
-14x + y = -28 divide both sides by -14 (remember rules)
x + y = 2

Ex with fractions:
(3/4)x - (1/4)y = 5 multiply both sides with 4 (LCD)
3x - 4y = 20

You are given equations in slope intercept form. Change them to standard form which is Ax + By = C where A and B are not zero AND A is a positive number

for example
y = 4x - 11
-4x + y = -11
4x - y = 11

the answers in order

-4x+y=-11
4x+y=43
4/5x+y=6/5
-5/2x + y= -22

5x+3y=450
x+y=450(not completely sure on the last number)
a. solve for x and y
b. graph the equation
c.write where the lines meet

im not completely sure if the last one is right or not but good luck