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Simplifying (12 + 7x) = 9x Remove parenthesis around (12 + 7x) 12 + 7x = 9x Solving 12 + 7x = 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 12 + 7x + -9x = 9x + -9x Combine like terms: 7x + -9x = -2x 12 + -2x = 9x + -9x Combine like terms: 9x + -9x = 0 12 + -2x = 0 Add '-12' to each side of the equation. 12 + -12 + -2x = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -2x = 0 + -12 -2x = 0 + -12 Combine like terms: 0 + -12 = -12 -2x = -12 Divide each side by '-2'. x = 6 Simplifying x = 6
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