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Simplifying 3x + 4x + -5 = 18 Reorder the terms: -5 + 3x + 4x = 18 Combine like terms: 3x + 4x = 7x -5 + 7x = 18 Solving -5 + 7x = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 7x = 18 + 5 Combine like terms: -5 + 5 = 0 0 + 7x = 18 + 5 7x = 18 + 5 Combine like terms: 18 + 5 = 23 7x = 23 Divide each side by '7'. x = 3.285714286 Simplifying x = 3.285714286
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