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Simplifying 80 + -1x = 90 + -2x Solving 80 + -1x = 90 + -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. 80 + -1x + 2x = 90 + -2x + 2x Combine like terms: -1x + 2x = 1x 80 + 1x = 90 + -2x + 2x Combine like terms: -2x + 2x = 0 80 + 1x = 90 + 0 80 + 1x = 90 Add '-80' to each side of the equation. 80 + -80 + 1x = 90 + -80 Combine like terms: 80 + -80 = 0 0 + 1x = 90 + -80 1x = 90 + -80 Combine like terms: 90 + -80 = 10 1x = 10 Divide each side by '1'. x = 10 Simplifying x = 10
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