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Simplifying 2x + -9 + 87 + -9x * 9 + 1 = 100 Reorder the terms for easier multiplication: 2x + -9 + 87 + -9 * 9x + 1 = 100 Multiply -9 * 9 2x + -9 + 87 + -81x + 1 = 100 Reorder the terms: -9 + 87 + 1 + 2x + -81x = 100 Combine like terms: -9 + 87 = 78 78 + 1 + 2x + -81x = 100 Combine like terms: 78 + 1 = 79 79 + 2x + -81x = 100 Combine like terms: 2x + -81x = -79x 79 + -79x = 100 Solving 79 + -79x = 100 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-79' to each side of the equation. 79 + -79 + -79x = 100 + -79 Combine like terms: 79 + -79 = 0 0 + -79x = 100 + -79 -79x = 100 + -79 Combine like terms: 100 + -79 = 21 -79x = 21 Divide each side by '-79'. x = -0.2658227848 Simplifying x = -0.2658227848
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