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Simplifying 7x + 4 + 4x + -8 = 90 Reorder the terms: 4 + -8 + 7x + 4x = 90 Combine like terms: 4 + -8 = -4 -4 + 7x + 4x = 90 Combine like terms: 7x + 4x = 11x -4 + 11x = 90 Solving -4 + 11x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 11x = 90 + 4 Combine like terms: -4 + 4 = 0 0 + 11x = 90 + 4 11x = 90 + 4 Combine like terms: 90 + 4 = 94 11x = 94 Divide each side by '11'. x = 8.545454545 Simplifying x = 8.545454545
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