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Simplifying 7x + -2(6x + -9) = 63 Reorder the terms: 7x + -2(-9 + 6x) = 63 7x + (-9 * -2 + 6x * -2) = 63 7x + (18 + -12x) = 63 Reorder the terms: 18 + 7x + -12x = 63 Combine like terms: 7x + -12x = -5x 18 + -5x = 63 Solving 18 + -5x = 63 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -5x = 63 + -18 Combine like terms: 18 + -18 = 0 0 + -5x = 63 + -18 -5x = 63 + -18 Combine like terms: 63 + -18 = 45 -5x = 45 Divide each side by '-5'. x = -9 Simplifying x = -9
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