X=4+y/4 y=?
X=12-y/4
Draw grapy of this equation
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adding 1and 2
we get 2x=16
x=8
by substituting value of x in 1
8=4+y/4
4=y/4
y=16
we get 2x=16
x=8
by substituting value of x in 1
8=4+y/4
4=y/4
y=16
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