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Simplifying 7x + -2(-10) = 40 Multiply -2 * -10 7x + 20 = 40 Reorder the terms: 20 + 7x = 40 Solving 20 + 7x = 40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 7x = 40 + -20 Combine like terms: 20 + -20 = 0 0 + 7x = 40 + -20 7x = 40 + -20 Combine like terms: 40 + -20 = 20 7x = 20 Divide each side by '7'. x = 2.857142857 Simplifying x = 2.857142857
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