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Simplifying -143 + 7x = -4x + 55 Reorder the terms: -143 + 7x = 55 + -4x Solving -143 + 7x = 55 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. -143 + 7x + 4x = 55 + -4x + 4x Combine like terms: 7x + 4x = 11x -143 + 11x = 55 + -4x + 4x Combine like terms: -4x + 4x = 0 -143 + 11x = 55 + 0 -143 + 11x = 55 Add '143' to each side of the equation. -143 + 143 + 11x = 55 + 143 Combine like terms: -143 + 143 = 0 0 + 11x = 55 + 143 11x = 55 + 143 Combine like terms: 55 + 143 = 198 11x = 198 Divide each side by '11'. x = 18 Simplifying x = 18
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