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Simplifying 7x + 2(x + -2) = -40 Reorder the terms: 7x + 2(-2 + x) = -40 7x + (-2 * 2 + x * 2) = -40 7x + (-4 + 2x) = -40 Reorder the terms: -4 + 7x + 2x = -40 Combine like terms: 7x + 2x = 9x -4 + 9x = -40 Solving -4 + 9x = -40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 9x = -40 + 4 Combine like terms: -4 + 4 = 0 0 + 9x = -40 + 4 9x = -40 + 4 Combine like terms: -40 + 4 = -36 9x = -36 Divide each side by '9'. x = -4 Simplifying x = -4
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