0
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x = 15
x=6=x=5+x=13+x=20 x cannot = x+5. This question has no answer.
x = 5
If its x+4x+5 then: 5x+5
x+4x+5=5x+5
X= 5
x + 6
15
y equals x plus 5 is the equation of a straight line in the x-y plane.
5
-5
x=0