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Simplifying x + 2x + 7 = 121 Reorder the terms: 7 + x + 2x = 121 Combine like terms: x + 2x = 3x 7 + 3x = 121 Solving 7 + 3x = 121 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 3x = 121 + -7 Combine like terms: 7 + -7 = 0 0 + 3x = 121 + -7 3x = 121 + -7 Combine like terms: 121 + -7 = 114 3x = 114 Divide each side by '3'. x = 38 Simplifying x = 38
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