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Simplifying -243 = -99(10 + x) -243 = (10 * -99 + x * -99) -243 = (-990 + -99x) Solving -243 = -990 + -99x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '99x' to each side of the equation. -243 + 99x = -990 + -99x + 99x Combine like terms: -99x + 99x = 0 -243 + 99x = -990 + 0 -243 + 99x = -990 Add '243' to each side of the equation. -243 + 243 + 99x = -990 + 243 Combine like terms: -243 + 243 = 0 0 + 99x = -990 + 243 99x = -990 + 243 Combine like terms: -990 + 243 = -747 99x = -747 Divide each side by '99'. x = -7.545454545 Simplifying x = -7.545454545
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