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Simplifying 2x + 5x + -1(x + 20) = 180 Reorder the terms: 2x + 5x + -1(20 + x) = 180 2x + 5x + (20 * -1 + x * -1) = 180 2x + 5x + (-20 + -1x) = 180 Reorder the terms: -20 + 2x + 5x + -1x = 180 Combine like terms: 2x + 5x = 7x -20 + 7x + -1x = 180 Combine like terms: 7x + -1x = 6x -20 + 6x = 180 Solving -20 + 6x = 180 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 + 6x = 180 + 20 Combine like terms: -20 + 20 = 0 0 + 6x = 180 + 20 6x = 180 + 20 Combine like terms: 180 + 20 = 200 6x = 200 Divide each side by '6'. x = 33.33333333 Simplifying x = 33.33333333
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