Question 364826
x-y =16.......................1
x=5y-4
x-5y=-4........................2
..
multiply equation 1 by -1
-x+y=-16
add this to equation 2
x-x-5y+y=-4+16
-4y=-20
/-4
y=5
...
plug value of y in equation 1
x-(5)=21
x=21
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