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Simplifying 12x + 9 = 20 + -7x Reorder the terms: 9 + 12x = 20 + -7x Solving 9 + 12x = 20 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 9 + 12x + 7x = 20 + -7x + 7x Combine like terms: 12x + 7x = 19x 9 + 19x = 20 + -7x + 7x Combine like terms: -7x + 7x = 0 9 + 19x = 20 + 0 9 + 19x = 20 Add '-9' to each side of the equation. 9 + -9 + 19x = 20 + -9 Combine like terms: 9 + -9 = 0 0 + 19x = 20 + -9 19x = 20 + -9 Combine like terms: 20 + -9 = 11 19x = 11 Divide each side by '19'. x = 0.5789473684 Simplifying x = 0.5789473684
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