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Simplifying 40 + x = 2x Solving 40 + x = 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. 40 + x + -2x = 2x + -2x Combine like terms: x + -2x = -1x 40 + -1x = 2x + -2x Combine like terms: 2x + -2x = 0 40 + -1x = 0 Add '-40' to each side of the equation. 40 + -40 + -1x = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -1x = 0 + -40 -1x = 0 + -40 Combine like terms: 0 + -40 = -40 -1x = -40 Divide each side by '-1'. x = 40 Simplifying x = 40
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