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Simplifying -20 = -9 + 7x Solving -20 = -9 + 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 + -7x = -9 + 7x + -7x Combine like terms: 7x + -7x = 0 -20 + -7x = -9 + 0 -20 + -7x = -9 Add '20' to each side of the equation. -20 + 20 + -7x = -9 + 20 Combine like terms: -20 + 20 = 0 0 + -7x = -9 + 20 -7x = -9 + 20 Combine like terms: -9 + 20 = 11 -7x = 11 Divide each side by '-7'. x = -1.571428571 Simplifying x = -1.571428571
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