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Simplifying 180 = 7x + (x + 20) Reorder the terms: 180 = 7x + (20 + x) Remove parenthesis around (20 + x) 180 = 7x + 20 + x Reorder the terms: 180 = 20 + 7x + x Combine like terms: 7x + x = 8x 180 = 20 + 8x Solving 180 = 20 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 180 + -8x = 20 + 8x + -8x Combine like terms: 8x + -8x = 0 180 + -8x = 20 + 0 180 + -8x = 20 Add '-180' to each side of the equation. 180 + -180 + -8x = 20 + -180 Combine like terms: 180 + -180 = 0 0 + -8x = 20 + -180 -8x = 20 + -180 Combine like terms: 20 + -180 = -160 -8x = -160 Divide each side by '-8'. x = 20 Simplifying x = 20
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