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Simplifying 4 + 3n = 20 + 7n Solving 4 + 3n = 20 + 7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7n' to each side of the equation. 4 + 3n + -7n = 20 + 7n + -7n Combine like terms: 3n + -7n = -4n 4 + -4n = 20 + 7n + -7n Combine like terms: 7n + -7n = 0 4 + -4n = 20 + 0 4 + -4n = 20 Add '-4' to each side of the equation. 4 + -4 + -4n = 20 + -4 Combine like terms: 4 + -4 = 0 0 + -4n = 20 + -4 -4n = 20 + -4 Combine like terms: 20 + -4 = 16 -4n = 16 Divide each side by '-4'. n = -4 Simplifying n = -4
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