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Simplifying 90 = 50 + -2x Solving 90 = 50 + -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 + 2x = 50 + -2x + 2x Combine like terms: -2x + 2x = 0 90 + 2x = 50 + 0 90 + 2x = 50 Add '-90' to each side of the equation. 90 + -90 + 2x = 50 + -90 Combine like terms: 90 + -90 = 0 0 + 2x = 50 + -90 2x = 50 + -90 Combine like terms: 50 + -90 = -40 2x = -40 Divide each side by '2'. x = -20 Simplifying x = -20
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