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Simplifying 7n + -2n = 8n + -1(-4n) Combine like terms: 7n + -2n = 5n 5n = 8n + -1(-4n) Remove parenthesis around (-4n) 5n = 8n + -1 * -4n Multiply -1 * -4 5n = 8n + 4n Combine like terms: 8n + 4n = 12n 5n = 12n Solving 5n = 12n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-12n' to each side of the equation. 5n + -12n = 12n + -12n Combine like terms: 5n + -12n = -7n -7n = 12n + -12n Combine like terms: 12n + -12n = 0 -7n = 0 Divide each side by '-7'. n = 0 Simplifying n = 0
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