Not sure what you are asking, clearly 6x is 3x plus 3x.
But the question asks "what is 3x equals 3x?"
"3x equals 3x" is a tautology.
(A logical tautology is a statement that is true regardless of the truth values of its parts)
If you are asking what the value of x is, this equation is true for any value of x.
All numbers are a solution of "3x equals 3x."
But the question is not very clear so please add some discussion to help?
3x+12 = 18 3x = 18-12 3x = 6 x = 2
y = 3x = 12y = 12
no
y equals 3x has the greater slope.
If x-3x=18 then x equals -9
3x=81 3x/3=81/3x=27
3x + 2 = 3x + 6 This is not possible.
3x-5=3x+5 There is no solution.
y = 15 (by transitivity)
(2, -1)
Their graphs are.
2x+3x = 5x