Rearrange the terms of the equations fo form Ax + By = C

Question

I really get confused about general form, like how do I do it, I don't understand at all.

x+3y = -1
2x+4y-12 = 0

Answer 1

Ax + By = C

x + 3y = 1 is in this form already

2x + 4y - 12 = 0
2x + 4y = 12