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Simplifying -2(x + 4) + 58 = 21 + 21 Reorder the terms: -2(4 + x) + 58 = 21 + 21 (4 * -2 + x * -2) + 58 = 21 + 21 (-8 + -2x) + 58 = 21 + 21 Reorder the terms: -8 + 58 + -2x = 21 + 21 Combine like terms: -8 + 58 = 50 50 + -2x = 21 + 21 Combine like terms: 21 + 21 = 42 50 + -2x = 42 Solving 50 + -2x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + -2x = 42 + -50 Combine like terms: 50 + -50 = 0 0 + -2x = 42 + -50 -2x = 42 + -50 Combine like terms: 42 + -50 = -8 -2x = -8 Divide each side by '-2'. x = 4 Simplifying x = 4
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