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Simplifying 21 + -5x = 13 + 40x Solving 21 + -5x = 13 + 40x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40x' to each side of the equation. 21 + -5x + -40x = 13 + 40x + -40x Combine like terms: -5x + -40x = -45x 21 + -45x = 13 + 40x + -40x Combine like terms: 40x + -40x = 0 21 + -45x = 13 + 0 21 + -45x = 13 Add '-21' to each side of the equation. 21 + -21 + -45x = 13 + -21 Combine like terms: 21 + -21 = 0 0 + -45x = 13 + -21 -45x = 13 + -21 Combine like terms: 13 + -21 = -8 -45x = -8 Divide each side by '-45'. x = 0.1777777778 Simplifying x = 0.1777777778
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