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Simplifying 7x + -15 = 18 + -4x Reorder the terms: -15 + 7x = 18 + -4x Solving -15 + 7x = 18 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. -15 + 7x + 4x = 18 + -4x + 4x Combine like terms: 7x + 4x = 11x -15 + 11x = 18 + -4x + 4x Combine like terms: -4x + 4x = 0 -15 + 11x = 18 + 0 -15 + 11x = 18 Add '15' to each side of the equation. -15 + 15 + 11x = 18 + 15 Combine like terms: -15 + 15 = 0 0 + 11x = 18 + 15 11x = 18 + 15 Combine like terms: 18 + 15 = 33 11x = 33 Divide each side by '11'. x = 3 Simplifying x = 3
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