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Simplifying 5x + 2(2x + -1) = 7 Reorder the terms: 5x + 2(-1 + 2x) = 7 5x + (-1 * 2 + 2x * 2) = 7 5x + (-2 + 4x) = 7 Reorder the terms: -2 + 5x + 4x = 7 Combine like terms: 5x + 4x = 9x -2 + 9x = 7 Solving -2 + 9x = 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 + 9x = 7 + 2 Combine like terms: -2 + 2 = 0 0 + 9x = 7 + 2 9x = 7 + 2 Combine like terms: 7 + 2 = 9 9x = 9 Divide each side by '9'. x = 1 Simplifying x = 1
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