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Simplifying (x + 21) + -1(2x + -5) = 3 Reorder the terms: (21 + x) + -1(2x + -5) = 3 Remove parenthesis around (21 + x) 21 + x + -1(2x + -5) = 3 Reorder the terms: 21 + x + -1(-5 + 2x) = 3 21 + x + (-5 * -1 + 2x * -1) = 3 21 + x + (5 + -2x) = 3 Reorder the terms: 21 + 5 + x + -2x = 3 Combine like terms: 21 + 5 = 26 26 + x + -2x = 3 Combine like terms: x + -2x = -1x 26 + -1x = 3 Solving 26 + -1x = 3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-26' to each side of the equation. 26 + -26 + -1x = 3 + -26 Combine like terms: 26 + -26 = 0 0 + -1x = 3 + -26 -1x = 3 + -26 Combine like terms: 3 + -26 = -23 -1x = -23 Divide each side by '-1'. x = 23 Simplifying x = 23
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