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Simplifying 2 + -1 = 3(x + 7) Combine like terms: 2 + -1 = 1 1 = 3(x + 7) Reorder the terms: 1 = 3(7 + x) 1 = (7 * 3 + x * 3) 1 = (21 + 3x) Solving 1 = 21 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 1 + -3x = 21 + 3x + -3x Combine like terms: 3x + -3x = 0 1 + -3x = 21 + 0 1 + -3x = 21 Add '-1' to each side of the equation. 1 + -1 + -3x = 21 + -1 Combine like terms: 1 + -1 = 0 0 + -3x = 21 + -1 -3x = 21 + -1 Combine like terms: 21 + -1 = 20 -3x = 20 Divide each side by '-3'. x = -6.666666667 Simplifying x = -6.666666667
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