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Simplifying (7x + -12) = (2x + 9) Reorder the terms: (-12 + 7x) = (2x + 9) Remove parenthesis around (-12 + 7x) -12 + 7x = (2x + 9) Reorder the terms: -12 + 7x = (9 + 2x) Remove parenthesis around (9 + 2x) -12 + 7x = 9 + 2x Solving -12 + 7x = 9 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -12 + 7x + -2x = 9 + 2x + -2x Combine like terms: 7x + -2x = 5x -12 + 5x = 9 + 2x + -2x Combine like terms: 2x + -2x = 0 -12 + 5x = 9 + 0 -12 + 5x = 9 Add '12' to each side of the equation. -12 + 12 + 5x = 9 + 12 Combine like terms: -12 + 12 = 0 0 + 5x = 9 + 12 5x = 9 + 12 Combine like terms: 9 + 12 = 21 5x = 21 Divide each side by '5'. x = 4.2 Simplifying x = 4.2
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