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Simplifying 7900 = 40x + 4000 Reorder the terms: 7900 = 4000 + 40x Solving 7900 = 4000 + 40x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-40x' to each side of the equation. 7900 + -40x = 4000 + 40x + -40x Combine like terms: 40x + -40x = 0 7900 + -40x = 4000 + 0 7900 + -40x = 4000 Add '-7900' to each side of the equation. 7900 + -7900 + -40x = 4000 + -7900 Combine like terms: 7900 + -7900 = 0 0 + -40x = 4000 + -7900 -40x = 4000 + -7900 Combine like terms: 4000 + -7900 = -3900 -40x = -3900 Divide each side by '-40'. x = 97.5 Simplifying x = 97.5
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