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Simplifying 90 + -3x = 2x + 15 Reorder the terms: 90 + -3x = 15 + 2x Solving 90 + -3x = 15 + 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. 90 + -3x + -2x = 15 + 2x + -2x Combine like terms: -3x + -2x = -5x 90 + -5x = 15 + 2x + -2x Combine like terms: 2x + -2x = 0 90 + -5x = 15 + 0 90 + -5x = 15 Add '-90' to each side of the equation. 90 + -90 + -5x = 15 + -90 Combine like terms: 90 + -90 = 0 0 + -5x = 15 + -90 -5x = 15 + -90 Combine like terms: 15 + -90 = -75 -5x = -75 Divide each side by '-5'. x = 15 Simplifying x = 15
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