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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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