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Simplifying 21 + -9(21x + 21) = 14x + -3 Reorder the terms: 21 + -9(21 + 21x) = 14x + -3 21 + (21 * -9 + 21x * -9) = 14x + -3 21 + (-189 + -189x) = 14x + -3 Combine like terms: 21 + -189 = -168 -168 + -189x = 14x + -3 Reorder the terms: -168 + -189x = -3 + 14x Solving -168 + -189x = -3 + 14x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14x' to each side of the equation. -168 + -189x + -14x = -3 + 14x + -14x Combine like terms: -189x + -14x = -203x -168 + -203x = -3 + 14x + -14x Combine like terms: 14x + -14x = 0 -168 + -203x = -3 + 0 -168 + -203x = -3 Add '168' to each side of the equation. -168 + 168 + -203x = -3 + 168 Combine like terms: -168 + 168 = 0 0 + -203x = -3 + 168 -203x = -3 + 168 Combine like terms: -3 + 168 = 165 -203x = 165 Divide each side by '-203'. x = -0.8128078818 Simplifying x = -0.8128078818
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