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Simplifying 45x + -90 = 6x + -21 Reorder the terms: -90 + 45x = 6x + -21 Reorder the terms: -90 + 45x = -21 + 6x Solving -90 + 45x = -21 + 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. -90 + 45x + -6x = -21 + 6x + -6x Combine like terms: 45x + -6x = 39x -90 + 39x = -21 + 6x + -6x Combine like terms: 6x + -6x = 0 -90 + 39x = -21 + 0 -90 + 39x = -21 Add '90' to each side of the equation. -90 + 90 + 39x = -21 + 90 Combine like terms: -90 + 90 = 0 0 + 39x = -21 + 90 39x = -21 + 90 Combine like terms: -21 + 90 = 69 39x = 69 Divide each side by '39'. x = 1.769230769 Simplifying x = 1.769230769
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