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Simplifying (x + 3) + (2x + -1) = 7 Reorder the terms: (3 + x) + (2x + -1) = 7 Remove parenthesis around (3 + x) 3 + x + (2x + -1) = 7 Reorder the terms: 3 + x + (-1 + 2x) = 7 Remove parenthesis around (-1 + 2x) 3 + x + -1 + 2x = 7 Reorder the terms: 3 + -1 + x + 2x = 7 Combine like terms: 3 + -1 = 2 2 + x + 2x = 7 Combine like terms: x + 2x = 3x 2 + 3x = 7 Solving 2 + 3x = 7 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 + 3x = 7 + -2 Combine like terms: 2 + -2 = 0 0 + 3x = 7 + -2 3x = 7 + -2 Combine like terms: 7 + -2 = 5 3x = 5 Divide each side by '3'. x = 1.666666667 Simplifying x = 1.666666667
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