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Simplifying 7x + -2(x + 6) = 13 Reorder the terms: 7x + -2(6 + x) = 13 7x + (6 * -2 + x * -2) = 13 7x + (-12 + -2x) = 13 Reorder the terms: -12 + 7x + -2x = 13 Combine like terms: 7x + -2x = 5x -12 + 5x = 13 Solving -12 + 5x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 5x = 13 + 12 Combine like terms: -12 + 12 = 0 0 + 5x = 13 + 12 5x = 13 + 12 Combine like terms: 13 + 12 = 25 5x = 25 Divide each side by '5'. x = 5 Simplifying x = 5
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