How to find the gradient of a line? :)?

L

Look Alive Sunshine :)

New member
Hey guys!
So I know that there are heaps of methods to get the gradient, like
1. In the form y=mx+c, m is the gradient.
2. When given 2 points y-y/x-x
3. tan(angle) =m

But when I'm given an equation like
2x+y=3
How am I supposed to work out the gradient? None of the methods I've been taught works.

Thanks in advance :)
 
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