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Simplifying 12 + 7x = 5[x + 2] Reorder the terms: 12 + 7x = 5[2 + x] 12 + 7x = [2 * 5 + x * 5] 12 + 7x = [10 + 5x] Solving 12 + 7x = 10 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. 12 + 7x + -5x = 10 + 5x + -5x Combine like terms: 7x + -5x = 2x 12 + 2x = 10 + 5x + -5x Combine like terms: 5x + -5x = 0 12 + 2x = 10 + 0 12 + 2x = 10 Add '-12' to each side of the equation. 12 + -12 + 2x = 10 + -12 Combine like terms: 12 + -12 = 0 0 + 2x = 10 + -12 2x = 10 + -12 Combine like terms: 10 + -12 = -2 2x = -2 Divide each side by '2'. x = -1 Simplifying x = -1
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