From Equation 2
is obtained; Intercept x = (40,0)
Y = (0,40)
to 20x + 10y <600 ------------
X + Y <---------- 40. ------ leading 10 x to 10x + 10y <400 -------- so, x = 20, y = 30 is the intersection of 20x + 10y = 600 and x + y = 40 is (20. , 30), the picture shows.
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