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Simplifying l + 2l + (l + 7) = 115 Reorder the terms: l + 2l + (7 + l) = 115 Remove parenthesis around (7 + l) l + 2l + 7 + l = 115 Reorder the terms: 7 + l + 2l + l = 115 Combine like terms: l + 2l = 3l 7 + 3l + l = 115 Combine like terms: 3l + l = 4l 7 + 4l = 115 Solving 7 + 4l = 115 Solving for variable 'l'. Move all terms containing l to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 4l = 115 + -7 Combine like terms: 7 + -7 = 0 0 + 4l = 115 + -7 4l = 115 + -7 Combine like terms: 115 + -7 = 108 4l = 108 Divide each side by '4'. l = 27 Simplifying l = 27
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