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Simplifying 9x2 + 6 = 9x2 + 9x + -18 Reorder the terms: 6 + 9x2 = 9x2 + 9x + -18 Reorder the terms: 6 + 9x2 = -18 + 9x + 9x2 Add '-9x2' to each side of the equation. 6 + 9x2 + -9x2 = -18 + 9x + 9x2 + -9x2 Combine like terms: 9x2 + -9x2 = 0 6 + 0 = -18 + 9x + 9x2 + -9x2 6 = -18 + 9x + 9x2 + -9x2 Combine like terms: 9x2 + -9x2 = 0 6 = -18 + 9x + 0 6 = -18 + 9x Solving 6 = -18 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 6 + -9x = -18 + 9x + -9x Combine like terms: 9x + -9x = 0 6 + -9x = -18 + 0 6 + -9x = -18 Add '-6' to each side of the equation. 6 + -6 + -9x = -18 + -6 Combine like terms: 6 + -6 = 0 0 + -9x = -18 + -6 -9x = -18 + -6 Combine like terms: -18 + -6 = -24 -9x = -24 Divide each side by '-9'. x = 2.666666667 Simplifying x = 2.666666667
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