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Simplifying 12 + -7x = -12 + -9x Solving 12 + -7x = -12 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. 12 + -7x + 9x = -12 + -9x + 9x Combine like terms: -7x + 9x = 2x 12 + 2x = -12 + -9x + 9x Combine like terms: -9x + 9x = 0 12 + 2x = -12 + 0 12 + 2x = -12 Add '-12' to each side of the equation. 12 + -12 + 2x = -12 + -12 Combine like terms: 12 + -12 = 0 0 + 2x = -12 + -12 2x = -12 + -12 Combine like terms: -12 + -12 = -24 2x = -24 Divide each side by '2'. x = -12 Simplifying x = -12
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