Question

how to solve 3x+5y=15​

Answer 1

First subtract the 3x from both sides like this: 3x-3x+5y=15-3x

you should get: 5y=-3x+15 because  3x and the -3x cancel each other out

Now divide both sides by 5, like this: 5y/5=(-3x+15)/5

Now you should get: y=-3/5x+3

the slope is: -3 over 5

The Y-Intercept is: 3

So find 3 on the Y axis and put a point on that spot. Now go down 3 spaces and to the right 5 spaces, because the slope is -3 over 5. You can also reverse this and go up 3 and 5 to the left.  

Hope this helps

=)