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Simplifying 180 + -1x = 90(90 + -1x) 180 + -1x = (90 * 90 + -1x * 90) 180 + -1x = (8100 + -90x) Solving 180 + -1x = 8100 + -90x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '90x' to each side of the equation. 180 + -1x + 90x = 8100 + -90x + 90x Combine like terms: -1x + 90x = 89x 180 + 89x = 8100 + -90x + 90x Combine like terms: -90x + 90x = 0 180 + 89x = 8100 + 0 180 + 89x = 8100 Add '-180' to each side of the equation. 180 + -180 + 89x = 8100 + -180 Combine like terms: 180 + -180 = 0 0 + 89x = 8100 + -180 89x = 8100 + -180 Combine like terms: 8100 + -180 = 7920 89x = 7920 Divide each side by '89'. x = 88.98876404 Simplifying x = 88.98876404
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