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Simplifying 13 + -1(x + 7) = 8x + -3 Reorder the terms: 13 + -1(7 + x) = 8x + -3 13 + (7 * -1 + x * -1) = 8x + -3 13 + (-7 + -1x) = 8x + -3 Combine like terms: 13 + -7 = 6 6 + -1x = 8x + -3 Reorder the terms: 6 + -1x = -3 + 8x Solving 6 + -1x = -3 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 6 + -1x + -8x = -3 + 8x + -8x Combine like terms: -1x + -8x = -9x 6 + -9x = -3 + 8x + -8x Combine like terms: 8x + -8x = 0 6 + -9x = -3 + 0 6 + -9x = -3 Add '-6' to each side of the equation. 6 + -6 + -9x = -3 + -6 Combine like terms: 6 + -6 = 0 0 + -9x = -3 + -6 -9x = -3 + -6 Combine like terms: -3 + -6 = -9 -9x = -9 Divide each side by '-9'. x = 1 Simplifying x = 1
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