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Simplifying 20 + -5x = 12 + -7x Solving 20 + -5x = 12 + -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. 20 + -5x + 7x = 12 + -7x + 7x Combine like terms: -5x + 7x = 2x 20 + 2x = 12 + -7x + 7x Combine like terms: -7x + 7x = 0 20 + 2x = 12 + 0 20 + 2x = 12 Add '-20' to each side of the equation. 20 + -20 + 2x = 12 + -20 Combine like terms: 20 + -20 = 0 0 + 2x = 12 + -20 2x = 12 + -20 Combine like terms: 12 + -20 = -8 2x = -8 Divide each side by '2'. x = -4 Simplifying x = -4
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