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Simplifying 21 = -1x + (14x + 8) Reorder the terms: 21 = -1x + (8 + 14x) Remove parenthesis around (8 + 14x) 21 = -1x + 8 + 14x Reorder the terms: 21 = 8 + -1x + 14x Combine like terms: -1x + 14x = 13x 21 = 8 + 13x Solving 21 = 8 + 13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13x' to each side of the equation. 21 + -13x = 8 + 13x + -13x Combine like terms: 13x + -13x = 0 21 + -13x = 8 + 0 21 + -13x = 8 Add '-21' to each side of the equation. 21 + -21 + -13x = 8 + -21 Combine like terms: 21 + -21 = 0 0 + -13x = 8 + -21 -13x = 8 + -21 Combine like terms: 8 + -21 = -13 -13x = -13 Divide each side by '-13'. x = 1 Simplifying x = 1
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