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