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Simplifying 7x + -20 = -78 + -7x Reorder the terms: -20 + 7x = -78 + -7x Solving -20 + 7x = -78 + -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 + 7x = -78 + -7x + 7x Combine like terms: 7x + 7x = 14x -20 + 14x = -78 + -7x + 7x Combine like terms: -7x + 7x = 0 -20 + 14x = -78 + 0 -20 + 14x = -78 Add '20' to each side of the equation. -20 + 20 + 14x = -78 + 20 Combine like terms: -20 + 20 = 0 0 + 14x = -78 + 20 14x = -78 + 20 Combine like terms: -78 + 20 = -58 14x = -58 Divide each side by '14'. x = -4.142857143 Simplifying x = -4.142857143
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