how do I get the answer to writing this in slope -intercept form for x-y=4

this is in a 8th grade math book parent trying to help son with homework and lost .were would be the best place to start. how to get answers to

3x+5y=15

2x+3y=-12

-5x+2y=10

write each equation in slope-intercept form and then find the slope and y-intercept

3x=9y

3x-y=14

2x-8y=32

x+4y=12

write each equation in slope-intercept form and then find the slope and y-intercept:

the slope-intercept form would be y=kx+b, with k as slope, b as y-intercept

3x=9y: y=(1/3)x, k=1/3, b=0

3x-y=14: y=3x-14, k=3, b=-14

2x-8y=32: y=(1/4)x-4, k=1/4, b=-4

x+4y=12: y=(-1/4)x+3, k=-1/4, b=3

not sure what the first part of the question is asking...if you have any other questions, let me know, thanks.

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