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Simplifying 3x + -5 + 4x + 3 = 90 Reorder the terms: -5 + 3 + 3x + 4x = 90 Combine like terms: -5 + 3 = -2 -2 + 3x + 4x = 90 Combine like terms: 3x + 4x = 7x -2 + 7x = 90 Solving -2 + 7x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 7x = 90 + 2 Combine like terms: -2 + 2 = 0 0 + 7x = 90 + 2 7x = 90 + 2 Combine like terms: 90 + 2 = 92 7x = 92 Divide each side by '7'. x = 13.14285714 Simplifying x = 13.14285714
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