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Simplifying 3x + -1(2 + -1x) = 9 + 7x 3x + (2 * -1 + -1x * -1) = 9 + 7x 3x + (-2 + 1x) = 9 + 7x Reorder the terms: -2 + 3x + 1x = 9 + 7x Combine like terms: 3x + 1x = 4x -2 + 4x = 9 + 7x Solving -2 + 4x = 9 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -2 + 4x + -7x = 9 + 7x + -7x Combine like terms: 4x + -7x = -3x -2 + -3x = 9 + 7x + -7x Combine like terms: 7x + -7x = 0 -2 + -3x = 9 + 0 -2 + -3x = 9 Add '2' to each side of the equation. -2 + 2 + -3x = 9 + 2 Combine like terms: -2 + 2 = 0 0 + -3x = 9 + 2 -3x = 9 + 2 Combine like terms: 9 + 2 = 11 -3x = 11 Divide each side by '-3'. x = -3.666666667 Simplifying x = -3.666666667
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