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Simplifying 4(x + 2) + -5 = -21 + x Reorder the terms: 4(2 + x) + -5 = -21 + x (2 * 4 + x * 4) + -5 = -21 + x (8 + 4x) + -5 = -21 + x Reorder the terms: 8 + -5 + 4x = -21 + x Combine like terms: 8 + -5 = 3 3 + 4x = -21 + x Solving 3 + 4x = -21 + 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. 3 + 4x + -1x = -21 + x + -1x Combine like terms: 4x + -1x = 3x 3 + 3x = -21 + x + -1x Combine like terms: x + -1x = 0 3 + 3x = -21 + 0 3 + 3x = -21 Add '-3' to each side of the equation. 3 + -3 + 3x = -21 + -3 Combine like terms: 3 + -3 = 0 0 + 3x = -21 + -3 3x = -21 + -3 Combine like terms: -21 + -3 = -24 3x = -24 Divide each side by '3'. x = -8 Simplifying x = -8
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