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Simplifying 7x + -20 = 12 + -9x Reorder the terms: -20 + 7x = 12 + -9x Solving -20 + 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. -20 + 7x + 9x = 12 + -9x + 9x Combine like terms: 7x + 9x = 16x -20 + 16x = 12 + -9x + 9x Combine like terms: -9x + 9x = 0 -20 + 16x = 12 + 0 -20 + 16x = 12 Add '20' to each side of the equation. -20 + 20 + 16x = 12 + 20 Combine like terms: -20 + 20 = 0 0 + 16x = 12 + 20 16x = 12 + 20 Combine like terms: 12 + 20 = 32 16x = 32 Divide each side by '16'. x = 2 Simplifying x = 2
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