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Simplifying 220 + 640x = 2780 Solving 220 + 640x = 2780 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-220' to each side of the equation. 220 + -220 + 640x = 2780 + -220 Combine like terms: 220 + -220 = 0 0 + 640x = 2780 + -220 640x = 2780 + -220 Combine like terms: 2780 + -220 = 2560 640x = 2560 Divide each side by '640'. x = 4 Simplifying x = 4
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