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Simplifying 9x + -2(x + -2) = 13 Reorder the terms: 9x + -2(-2 + x) = 13 9x + (-2 * -2 + x * -2) = 13 9x + (4 + -2x) = 13 Reorder the terms: 4 + 9x + -2x = 13 Combine like terms: 9x + -2x = 7x 4 + 7x = 13 Solving 4 + 7x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 7x = 13 + -4 Combine like terms: 4 + -4 = 0 0 + 7x = 13 + -4 7x = 13 + -4 Combine like terms: 13 + -4 = 9 7x = 9 Divide each side by '7'. x = 1.285714286 Simplifying x = 1.285714286
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