How to change into slope-intercept format

How to change these equations into slope-intercept format? Please Explain step-by-step. Thanks!

1. 2x+6y = 18

2. -4x - 12y = -24

3. 3 (2x - 4y) = 48

4. y+7x = 21+3x

5. 9x-18y = 36

slope-intercept format is written as y = mx + c
where m is the slope and c is the intercept

1. 2x + 6y = 18
6y = -2x + 18
y = -2/6 x + 3

2. -4x - 12y = -24
-12y = 4x -24
y = 1/3 x + 2

3. 3 (2x - 4y) = 48
2x - 4y = 16
-4y = -2x + 16
y = 1/2 x - 4

4. y + 7x = 21 + 3x
y = -4x + 21

5. 9x - 18y = 36
-18y = -9x + 36
y = 1/2 x - 2