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Simplifying 3x2 + 7x + -5 = 16 + 3x2 Reorder the terms: -5 + 7x + 3x2 = 16 + 3x2 Add '-3x2' to each side of the equation. -5 + 7x + 3x2 + -3x2 = 16 + 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 -5 + 7x + 0 = 16 + 3x2 + -3x2 -5 + 7x = 16 + 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 -5 + 7x = 16 + 0 -5 + 7x = 16 Solving -5 + 7x = 16 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 7x = 16 + 5 Combine like terms: -5 + 5 = 0 0 + 7x = 16 + 5 7x = 16 + 5 Combine like terms: 16 + 5 = 21 7x = 21 Divide each side by '7'. x = 3 Simplifying x = 3
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