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Simplifying -57 = -7x + 20 Reorder the terms: -57 = 20 + -7x Solving -57 = 20 + -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. -57 + 7x = 20 + -7x + 7x Combine like terms: -7x + 7x = 0 -57 + 7x = 20 + 0 -57 + 7x = 20 Add '57' to each side of the equation. -57 + 57 + 7x = 20 + 57 Combine like terms: -57 + 57 = 0 0 + 7x = 20 + 57 7x = 20 + 57 Combine like terms: 20 + 57 = 77 7x = 77 Divide each side by '7'. x = 11 Simplifying x = 11
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