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