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Simplifying 7x + -3 + 2x + 7 = 49 Reorder the terms: -3 + 7 + 7x + 2x = 49 Combine like terms: -3 + 7 = 4 4 + 7x + 2x = 49 Combine like terms: 7x + 2x = 9x 4 + 9x = 49 Solving 4 + 9x = 49 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 + 9x = 49 + -4 Combine like terms: 4 + -4 = 0 0 + 9x = 49 + -4 9x = 49 + -4 Combine like terms: 49 + -4 = 45 9x = 45 Divide each side by '9'. x = 5 Simplifying x = 5
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