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Simplifying 13 + -7(x + 2) = 7 + x Reorder the terms: 13 + -7(2 + x) = 7 + x 13 + (2 * -7 + x * -7) = 7 + x 13 + (-14 + -7x) = 7 + x Combine like terms: 13 + -14 = -1 -1 + -7x = 7 + x Solving -1 + -7x = 7 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -1 + -7x + -1x = 7 + x + -1x Combine like terms: -7x + -1x = -8x -1 + -8x = 7 + x + -1x Combine like terms: x + -1x = 0 -1 + -8x = 7 + 0 -1 + -8x = 7 Add '1' to each side of the equation. -1 + 1 + -8x = 7 + 1 Combine like terms: -1 + 1 = 0 0 + -8x = 7 + 1 -8x = 7 + 1 Combine like terms: 7 + 1 = 8 -8x = 8 Divide each side by '-8'. x = -1 Simplifying x = -1
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