1
12
-1
Correct answer is B
27x×31−x92x=1 33x×31−x32(2−x)=30 33x×31−x÷34x=30 3(3x+1−x−4x)=30 3(1−2x)=30 since the bases are equal, 1 - 2x = 0 - 2x = -1 x = 12
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