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Simplifying 2x2 + -3x + 10 = 2x2 + 21 Reorder the terms: 10 + -3x + 2x2 = 2x2 + 21 Reorder the terms: 10 + -3x + 2x2 = 21 + 2x2 Add '-2x2' to each side of the equation. 10 + -3x + 2x2 + -2x2 = 21 + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 10 + -3x + 0 = 21 + 2x2 + -2x2 10 + -3x = 21 + 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 10 + -3x = 21 + 0 10 + -3x = 21 Solving 10 + -3x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -3x = 21 + -10 Combine like terms: 10 + -10 = 0 0 + -3x = 21 + -10 -3x = 21 + -10 Combine like terms: 21 + -10 = 11 -3x = 11 Divide each side by '-3'. x = -3.666666667 Simplifying x = -3.666666667
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