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Simplifying 9 + -8x = 20 + -15x Solving 9 + -8x = 20 + -15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15x' to each side of the equation. 9 + -8x + 15x = 20 + -15x + 15x Combine like terms: -8x + 15x = 7x 9 + 7x = 20 + -15x + 15x Combine like terms: -15x + 15x = 0 9 + 7x = 20 + 0 9 + 7x = 20 Add '-9' to each side of the equation. 9 + -9 + 7x = 20 + -9 Combine like terms: 9 + -9 = 0 0 + 7x = 20 + -9 7x = 20 + -9 Combine like terms: 20 + -9 = 11 7x = 11 Divide each side by '7'. x = 1.571428571 Simplifying x = 1.571428571
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