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Simplifying 45 = 30 + n Solving 45 = 30 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 45 + -1n = 30 + n + -1n Combine like terms: n + -1n = 0 45 + -1n = 30 + 0 45 + -1n = 30 Add '-45' to each side of the equation. 45 + -45 + -1n = 30 + -45 Combine like terms: 45 + -45 = 0 0 + -1n = 30 + -45 -1n = 30 + -45 Combine like terms: 30 + -45 = -15 -1n = -15 Divide each side by '-1'. n = 15 Simplifying n = 15
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