CEMC Fermat, 2006

Algebra Difficulty 1.0 Junior Find the answer Canada

If $2x + 3x + 4x = 12 + 9 + 6$ , then $x$ equals

(A) $6$ (B) $3$ (C) $1$ (D) $\frac{1}{3}$ (E) $10\frac{1}{2}$

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