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Simplifying 7x + -1(3x + 2) = 18 Reorder the terms: 7x + -1(2 + 3x) = 18 7x + (2 * -1 + 3x * -1) = 18 7x + (-2 + -3x) = 18 Reorder the terms: -2 + 7x + -3x = 18 Combine like terms: 7x + -3x = 4x -2 + 4x = 18 Solving -2 + 4x = 18 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 + 4x = 18 + 2 Combine like terms: -2 + 2 = 0 0 + 4x = 18 + 2 4x = 18 + 2 Combine like terms: 18 + 2 = 20 4x = 20 Divide each side by '4'. x = 5 Simplifying x = 5
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