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Simplifying 4x + 5 + 3x + 8 = 90 Reorder the terms: 5 + 8 + 4x + 3x = 90 Combine like terms: 5 + 8 = 13 13 + 4x + 3x = 90 Combine like terms: 4x + 3x = 7x 13 + 7x = 90 Solving 13 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 7x = 90 + -13 Combine like terms: 13 + -13 = 0 0 + 7x = 90 + -13 7x = 90 + -13 Combine like terms: 90 + -13 = 77 7x = 77 Divide each side by '7'. x = 11 Simplifying x = 11
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