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Simplifying 500 + 59X = 420 + 79X Solving 500 + 59X = 420 + 79X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-79X' to each side of the equation. 500 + 59X + -79X = 420 + 79X + -79X Combine like terms: 59X + -79X = -20X 500 + -20X = 420 + 79X + -79X Combine like terms: 79X + -79X = 0 500 + -20X = 420 + 0 500 + -20X = 420 Add '-500' to each side of the equation. 500 + -500 + -20X = 420 + -500 Combine like terms: 500 + -500 = 0 0 + -20X = 420 + -500 -20X = 420 + -500 Combine like terms: 420 + -500 = -80 -20X = -80 Divide each side by '-20'. X = 4 Simplifying X = 4
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