(2/3)x - (1/5) y = 10
to solve for x in terms of y:
(2/3)x - (1/5) y = 10
(2/3)x = 10 + (1/5)y
x = (10 + (1/5)y)(3/2)
x = 15 + 3/10 y
if y = 0; x = 15
to solve for y in terms of x:
(2/3)x - (1/5) y = 10
-(1/5) y = 10 - (2/3)x
y = (10 - (2/3)x) -5
y = -50 + 10/3 x
if x = 0; y = -50
slope = 10/3
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