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Simplifying 7 + 8n = 13 + 9n Solving 7 + 8n = 13 + 9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9n' to each side of the equation. 7 + 8n + -9n = 13 + 9n + -9n Combine like terms: 8n + -9n = -1n 7 + -1n = 13 + 9n + -9n Combine like terms: 9n + -9n = 0 7 + -1n = 13 + 0 7 + -1n = 13 Add '-7' to each side of the equation. 7 + -7 + -1n = 13 + -7 Combine like terms: 7 + -7 = 0 0 + -1n = 13 + -7 -1n = 13 + -7 Combine like terms: 13 + -7 = 6 -1n = 6 Divide each side by '-1'. n = -6 Simplifying n = -6
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