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Simplifying 7x + 4x + 3 = 90 Reorder the terms: 3 + 7x + 4x = 90 Combine like terms: 7x + 4x = 11x 3 + 11x = 90 Solving 3 + 11x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 11x = 90 + -3 Combine like terms: 3 + -3 = 0 0 + 11x = 90 + -3 11x = 90 + -3 Combine like terms: 90 + -3 = 87 11x = 87 Divide each side by '11'. x = 7.909090909 Simplifying x = 7.909090909
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