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Simplifying 15 + -4x = 20 + -9x Solving 15 + -4x = 20 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. 15 + -4x + 9x = 20 + -9x + 9x Combine like terms: -4x + 9x = 5x 15 + 5x = 20 + -9x + 9x Combine like terms: -9x + 9x = 0 15 + 5x = 20 + 0 15 + 5x = 20 Add '-15' to each side of the equation. 15 + -15 + 5x = 20 + -15 Combine like terms: 15 + -15 = 0 0 + 5x = 20 + -15 5x = 20 + -15 Combine like terms: 20 + -15 = 5 5x = 5 Divide each side by '5'. x = 1 Simplifying x = 1
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