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It is simple if you put it in slope-intercept form.

y=mx +b is where m=slope and b=y-intercept

-4x+5y=20

bring the 4x over to the other side

5y=4x+20

divide both sides by 5

y=4/5x+4

y=mx+b

b=4

y-intercept=4

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Q: What is the y-intercept- 4x plus 5y equals 20?
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