5x + 4y = 20
4y = 20 - 5x
y = 20/4 - 5/4x
y = 5 - 5/4x
The x intercept is when y = 0
0 = 5 - 5/4x
5/4x = 5
x = 4.5/5
x = 4
The y intercept is when x = 0
y = 5 - 5/4.0
y = 5
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