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Simplifying 40 = 2x + 7(x + -2) Reorder the terms: 40 = 2x + 7(-2 + x) 40 = 2x + (-2 * 7 + x * 7) 40 = 2x + (-14 + 7x) Reorder the terms: 40 = -14 + 2x + 7x Combine like terms: 2x + 7x = 9x 40 = -14 + 9x Solving 40 = -14 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 40 + -9x = -14 + 9x + -9x Combine like terms: 9x + -9x = 0 40 + -9x = -14 + 0 40 + -9x = -14 Add '-40' to each side of the equation. 40 + -40 + -9x = -14 + -40 Combine like terms: 40 + -40 = 0 0 + -9x = -14 + -40 -9x = -14 + -40 Combine like terms: -14 + -40 = -54 -9x = -54 Divide each side by '-9'. x = 6 Simplifying x = 6
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