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Simplifying 2x + 3(x + -7) = 13 Reorder the terms: 2x + 3(-7 + x) = 13 2x + (-7 * 3 + x * 3) = 13 2x + (-21 + 3x) = 13 Reorder the terms: -21 + 2x + 3x = 13 Combine like terms: 2x + 3x = 5x -21 + 5x = 13 Solving -21 + 5x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 5x = 13 + 21 Combine like terms: -21 + 21 = 0 0 + 5x = 13 + 21 5x = 13 + 21 Combine like terms: 13 + 21 = 34 5x = 34 Divide each side by '5'. x = 6.8 Simplifying x = 6.8
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