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Simplifying -87 + 7x = -4x + 122 Reorder the terms: -87 + 7x = 122 + -4x Solving -87 + 7x = 122 + -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. -87 + 7x + 4x = 122 + -4x + 4x Combine like terms: 7x + 4x = 11x -87 + 11x = 122 + -4x + 4x Combine like terms: -4x + 4x = 0 -87 + 11x = 122 + 0 -87 + 11x = 122 Add '87' to each side of the equation. -87 + 87 + 11x = 122 + 87 Combine like terms: -87 + 87 = 0 0 + 11x = 122 + 87 11x = 122 + 87 Combine like terms: 122 + 87 = 209 11x = 209 Divide each side by '11'. x = 19 Simplifying x = 19
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