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Simplifying 3x + -1 + -1(x + 2) = 13 + -7x Reorder the terms: 3x + -1 + -1(2 + x) = 13 + -7x 3x + -1 + (2 * -1 + x * -1) = 13 + -7x 3x + -1 + (-2 + -1x) = 13 + -7x Reorder the terms: -1 + -2 + 3x + -1x = 13 + -7x Combine like terms: -1 + -2 = -3 -3 + 3x + -1x = 13 + -7x Combine like terms: 3x + -1x = 2x -3 + 2x = 13 + -7x Solving -3 + 2x = 13 + -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. -3 + 2x + 7x = 13 + -7x + 7x Combine like terms: 2x + 7x = 9x -3 + 9x = 13 + -7x + 7x Combine like terms: -7x + 7x = 0 -3 + 9x = 13 + 0 -3 + 9x = 13 Add '3' to each side of the equation. -3 + 3 + 9x = 13 + 3 Combine like terms: -3 + 3 = 0 0 + 9x = 13 + 3 9x = 13 + 3 Combine like terms: 13 + 3 = 16 9x = 16 Divide each side by '9'. x = 1.777777778 Simplifying x = 1.777777778
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