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Simplifying 99 = 189 + -10x Solving 99 = 189 + -10x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10x' to each side of the equation. 99 + 10x = 189 + -10x + 10x Combine like terms: -10x + 10x = 0 99 + 10x = 189 + 0 99 + 10x = 189 Add '-99' to each side of the equation. 99 + -99 + 10x = 189 + -99 Combine like terms: 99 + -99 = 0 0 + 10x = 189 + -99 10x = 189 + -99 Combine like terms: 189 + -99 = 90 10x = 90 Divide each side by '10'. x = 9 Simplifying x = 9
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