(1 - 3x)(1 - 12x) = 11 - (5 - 6x)(6x + 5)
1-12x-3x+36x^2=11-(25-36x^2)
1-15x+36x^2=11-25+36x^2
-15x+36x^2-36x^2=11-25-1
-15x=-15
x=1
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Answers & Comments
(1 - 3x)(1 - 12x) = 11 - (5 - 6x)(6x + 5)
1-12x-3x+36x^2=11-(25-36x^2)
1-15x+36x^2=11-25+36x^2
-15x+36x^2-36x^2=11-25-1
-15x=-15
x=1