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Simplifying 180 = 2x + 21 Reorder the terms: 180 = 21 + 2x Solving 180 = 21 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 180 + -2x = 21 + 2x + -2x Combine like terms: 2x + -2x = 0 180 + -2x = 21 + 0 180 + -2x = 21 Add '-180' to each side of the equation. 180 + -180 + -2x = 21 + -180 Combine like terms: 180 + -180 = 0 0 + -2x = 21 + -180 -2x = 21 + -180 Combine like terms: 21 + -180 = -159 -2x = -159 Divide each side by '-2'. x = 79.5 Simplifying x = 79.5
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