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Simplifying 20 + -1(4N) = 4 Remove parenthesis around (4N) 20 + -1 * 4N = 4 Multiply -1 * 4 20 + -4N = 4 Solving 20 + -4N = 4 Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -4N = 4 + -20 Combine like terms: 20 + -20 = 0 0 + -4N = 4 + -20 -4N = 4 + -20 Combine like terms: 4 + -20 = -16 -4N = -16 Divide each side by '-4'. N = 4 Simplifying N = 4
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