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Simplifying 43 = (x + 7) + x Reorder the terms: 43 = (7 + x) + x Remove parenthesis around (7 + x) 43 = 7 + x + x Combine like terms: x + x = 2x 43 = 7 + 2x Solving 43 = 7 + 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. 43 + -2x = 7 + 2x + -2x Combine like terms: 2x + -2x = 0 43 + -2x = 7 + 0 43 + -2x = 7 Add '-43' to each side of the equation. 43 + -43 + -2x = 7 + -43 Combine like terms: 43 + -43 = 0 0 + -2x = 7 + -43 -2x = 7 + -43 Combine like terms: 7 + -43 = -36 -2x = -36 Divide each side by '-2'. x = 18 Simplifying x = 18
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