Question

if 2x+cy=8 and x=y=4 then c =​

Answer 1

c = 0

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Answer 2

Answer:

2x - cy = 8 and x =y

so, 2x - cx = 8

x (2 - c) = 8

x = 8 / (2-c)

denominator should not be zero

so, 2 - c = 0

c = 2

except value of c=2 the solution can be founded.