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Simplifying 5x2 + 21 = -18 Reorder the terms: 21 + 5x2 = -18 Solving 21 + 5x2 = -18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 5x2 = -18 + -21 Combine like terms: 21 + -21 = 0 0 + 5x2 = -18 + -21 5x2 = -18 + -21 Combine like terms: -18 + -21 = -39 5x2 = -39 Divide each side by '5'. x2 = -7.8 Simplifying x2 = -7.8 Reorder the terms: 7.8 + x2 = -7.8 + 7.8 Combine like terms: -7.8 + 7.8 = 0.0 7.8 + x2 = 0.0 The solution to this equation could not be determined.
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