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Simplifying 3x + -7 + 4x = 278 Reorder the terms: -7 + 3x + 4x = 278 Combine like terms: 3x + 4x = 7x -7 + 7x = 278 Solving -7 + 7x = 278 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 7x = 278 + 7 Combine like terms: -7 + 7 = 0 0 + 7x = 278 + 7 7x = 278 + 7 Combine like terms: 278 + 7 = 285 7x = 285 Divide each side by '7'. x = 40.71428571 Simplifying x = 40.71428571
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