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Simplifying 7 + 0.20n = 5 + 0.30n Solving 7 + 0.20n = 5 + 0.30n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.30n' to each side of the equation. 7 + 0.20n + -0.30n = 5 + 0.30n + -0.30n Combine like terms: 0.20n + -0.30n = -0.1n 7 + -0.1n = 5 + 0.30n + -0.30n Combine like terms: 0.30n + -0.30n = 0.00 7 + -0.1n = 5 + 0.00 7 + -0.1n = 5 Add '-7' to each side of the equation. 7 + -7 + -0.1n = 5 + -7 Combine like terms: 7 + -7 = 0 0 + -0.1n = 5 + -7 -0.1n = 5 + -7 Combine like terms: 5 + -7 = -2 -0.1n = -2 Divide each side by '-0.1'. n = 20 Simplifying n = 20
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