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Simplifying 2 + 8x + -9 = 8x + 9 + -4x Reorder the terms: 2 + -9 + 8x = 8x + 9 + -4x Combine like terms: 2 + -9 = -7 -7 + 8x = 8x + 9 + -4x Reorder the terms: -7 + 8x = 9 + 8x + -4x Combine like terms: 8x + -4x = 4x -7 + 8x = 9 + 4x Solving -7 + 8x = 9 + 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. -7 + 8x + -4x = 9 + 4x + -4x Combine like terms: 8x + -4x = 4x -7 + 4x = 9 + 4x + -4x Combine like terms: 4x + -4x = 0 -7 + 4x = 9 + 0 -7 + 4x = 9 Add '7' to each side of the equation. -7 + 7 + 4x = 9 + 7 Combine like terms: -7 + 7 = 0 0 + 4x = 9 + 7 4x = 9 + 7 Combine like terms: 9 + 7 = 16 4x = 16 Divide each side by '4'. x = 4 Simplifying x = 4
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