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Simplifying 2x + -3(x + -7) = 9 + -5x Reorder the terms: 2x + -3(-7 + x) = 9 + -5x 2x + (-7 * -3 + x * -3) = 9 + -5x 2x + (21 + -3x) = 9 + -5x Reorder the terms: 21 + 2x + -3x = 9 + -5x Combine like terms: 2x + -3x = -1x 21 + -1x = 9 + -5x Solving 21 + -1x = 9 + -5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5x' to each side of the equation. 21 + -1x + 5x = 9 + -5x + 5x Combine like terms: -1x + 5x = 4x 21 + 4x = 9 + -5x + 5x Combine like terms: -5x + 5x = 0 21 + 4x = 9 + 0 21 + 4x = 9 Add '-21' to each side of the equation. 21 + -21 + 4x = 9 + -21 Combine like terms: 21 + -21 = 0 0 + 4x = 9 + -21 4x = 9 + -21 Combine like terms: 9 + -21 = -12 4x = -12 Divide each side by '4'. x = -3 Simplifying x = -3
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