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Simplifying 2x + 90 = -8x Reorder the terms: 90 + 2x = -8x Solving 90 + 2x = -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. 90 + 2x + 8x = -8x + 8x Combine like terms: 2x + 8x = 10x 90 + 10x = -8x + 8x Combine like terms: -8x + 8x = 0 90 + 10x = 0 Add '-90' to each side of the equation. 90 + -90 + 10x = 0 + -90 Combine like terms: 90 + -90 = 0 0 + 10x = 0 + -90 10x = 0 + -90 Combine like terms: 0 + -90 = -90 10x = -90 Divide each side by '10'. x = -9 Simplifying x = -9
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