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Simplifying 3x + 9 = -11 + -7x Reorder the terms: 9 + 3x = -11 + -7x Solving 9 + 3x = -11 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 9 + 3x + 7x = -11 + -7x + 7x Combine like terms: 3x + 7x = 10x 9 + 10x = -11 + -7x + 7x Combine like terms: -7x + 7x = 0 9 + 10x = -11 + 0 9 + 10x = -11 Add '-9' to each side of the equation. 9 + -9 + 10x = -11 + -9 Combine like terms: 9 + -9 = 0 0 + 10x = -11 + -9 10x = -11 + -9 Combine like terms: -11 + -9 = -20 10x = -20 Divide each side by '10'. x = -2 Simplifying x = -2
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