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Simplifying [20 + -7x] = -8 Remove brackets around [20 + -7x] 20 + -7x = -8 Solving 20 + -7x = -8 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -7x = -8 + -20 Combine like terms: 20 + -20 = 0 0 + -7x = -8 + -20 -7x = -8 + -20 Combine like terms: -8 + -20 = -28 -7x = -28 Divide each side by '-7'. x = 4 Simplifying x = 4
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