Write y = x + 7 in standard form using integers.

3x - 2y = 21

-2x - 3y = 21

-2x + 3y = 7

-2x + 3y = 21

you have to start with replacing y with x+7 then - 7 from the right side and combine you integers (the letters x) once you are left with just the #x dived until you have 1x and that is how you do these type of questions

Step-by-step explanation:

3x - 2x+7 = 21

1x+7=21

1x=14

-2x - 3x+7 = 21

-6x+7=21

-6x=14

1x=-2.3

-2x + 3x+7 = 7

1x+7=7

1x=0

-2x + 3x+7 = 21

1x+7=21

1x=14