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Simplifying 138 = 77 + n Solving 138 = 77 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 138 + -1n = 77 + n + -1n Combine like terms: n + -1n = 0 138 + -1n = 77 + 0 138 + -1n = 77 Add '-138' to each side of the equation. 138 + -138 + -1n = 77 + -138 Combine like terms: 138 + -138 = 0 0 + -1n = 77 + -138 -1n = 77 + -138 Combine like terms: 77 + -138 = -61 -1n = -61 Divide each side by '-1'. n = 61 Simplifying n = 61
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