Taken literally as...
-0.2x + 12x + 11 = 0 (assuming nothing was lost during the question-asking process)
...this equation as exactly one solution:
-0.2x + 12x = -11
x(-0.2 + 12) = -11
x(11.8) = -11
x = -11/11.8 = -110/118 = -55/59 = -0.9322
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2 this Domo
One.
one
zero solutions. If you plot these two lines, you will see that they are parallel and do not intersect.
It has one double solution.