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Simplifying 9x + 4x + -7 = 3x + -137 Reorder the terms: -7 + 9x + 4x = 3x + -137 Combine like terms: 9x + 4x = 13x -7 + 13x = 3x + -137 Reorder the terms: -7 + 13x = -137 + 3x Solving -7 + 13x = -137 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -7 + 13x + -3x = -137 + 3x + -3x Combine like terms: 13x + -3x = 10x -7 + 10x = -137 + 3x + -3x Combine like terms: 3x + -3x = 0 -7 + 10x = -137 + 0 -7 + 10x = -137 Add '7' to each side of the equation. -7 + 7 + 10x = -137 + 7 Combine like terms: -7 + 7 = 0 0 + 10x = -137 + 7 10x = -137 + 7 Combine like terms: -137 + 7 = -130 10x = -130 Divide each side by '10'. x = -13 Simplifying x = -13
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