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Simplifying j + (j + 4) = 28 Reorder the terms: j + (4 + j) = 28 Remove parenthesis around (4 + j) j + 4 + j = 28 Reorder the terms: 4 + j + j = 28 Combine like terms: j + j = 2j 4 + 2j = 28 Solving 4 + 2j = 28 Solving for variable 'j'. Move all terms containing j to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 2j = 28 + -4 Combine like terms: 4 + -4 = 0 0 + 2j = 28 + -4 2j = 28 + -4 Combine like terms: 28 + -4 = 24 2j = 24 Divide each side by '2'. j = 12 Simplifying j = 12
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