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Simplifying 840 = 120 + 45n Solving 840 = 120 + 45n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-45n' to each side of the equation. 840 + -45n = 120 + 45n + -45n Combine like terms: 45n + -45n = 0 840 + -45n = 120 + 0 840 + -45n = 120 Add '-840' to each side of the equation. 840 + -840 + -45n = 120 + -840 Combine like terms: 840 + -840 = 0 0 + -45n = 120 + -840 -45n = 120 + -840 Combine like terms: 120 + -840 = -720 -45n = -720 Divide each side by '-45'. n = 16 Simplifying n = 16
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