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Simplifying 7x + -3(x + -4) = 9(x + 2) Reorder the terms: 7x + -3(-4 + x) = 9(x + 2) 7x + (-4 * -3 + x * -3) = 9(x + 2) 7x + (12 + -3x) = 9(x + 2) Reorder the terms: 12 + 7x + -3x = 9(x + 2) Combine like terms: 7x + -3x = 4x 12 + 4x = 9(x + 2) Reorder the terms: 12 + 4x = 9(2 + x) 12 + 4x = (2 * 9 + x * 9) 12 + 4x = (18 + 9x) Solving 12 + 4x = 18 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 12 + 4x + -9x = 18 + 9x + -9x Combine like terms: 4x + -9x = -5x 12 + -5x = 18 + 9x + -9x Combine like terms: 9x + -9x = 0 12 + -5x = 18 + 0 12 + -5x = 18 Add '-12' to each side of the equation. 12 + -12 + -5x = 18 + -12 Combine like terms: 12 + -12 = 0 0 + -5x = 18 + -12 -5x = 18 + -12 Combine like terms: 18 + -12 = 6 -5x = 6 Divide each side by '-5'. x = -1.2 Simplifying x = -1.2
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