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Simplifying 4(5n + -4) + 3 = 87 Reorder the terms: 4(-4 + 5n) + 3 = 87 (-4 * 4 + 5n * 4) + 3 = 87 (-16 + 20n) + 3 = 87 Reorder the terms: -16 + 3 + 20n = 87 Combine like terms: -16 + 3 = -13 -13 + 20n = 87 Solving -13 + 20n = 87 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + 20n = 87 + 13 Combine like terms: -13 + 13 = 0 0 + 20n = 87 + 13 20n = 87 + 13 Combine like terms: 87 + 13 = 100 20n = 100 Divide each side by '20'. n = 5 Simplifying n = 5
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