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Simplifying 4.2x + -6.78 = 7.5 Reorder the terms: -6.78 + 4.2x = 7.5 Solving -6.78 + 4.2x = 7.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.78' to each side of the equation. -6.78 + 6.78 + 4.2x = 7.5 + 6.78 Combine like terms: -6.78 + 6.78 = 0.00 0.00 + 4.2x = 7.5 + 6.78 4.2x = 7.5 + 6.78 Combine like terms: 7.5 + 6.78 = 14.28 4.2x = 14.28 Divide each side by '4.2'. x = 3.4 Simplifying x = 3.4
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