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Simplifying 7(x + -9) + -9(x + -7) = 63x Reorder the terms: 7(-9 + x) + -9(x + -7) = 63x (-9 * 7 + x * 7) + -9(x + -7) = 63x (-63 + 7x) + -9(x + -7) = 63x Reorder the terms: -63 + 7x + -9(-7 + x) = 63x -63 + 7x + (-7 * -9 + x * -9) = 63x -63 + 7x + (63 + -9x) = 63x Reorder the terms: -63 + 63 + 7x + -9x = 63x Combine like terms: -63 + 63 = 0 0 + 7x + -9x = 63x 7x + -9x = 63x Combine like terms: 7x + -9x = -2x -2x = 63x Solving -2x = 63x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-63x' to each side of the equation. -2x + -63x = 63x + -63x Combine like terms: -2x + -63x = -65x -65x = 63x + -63x Combine like terms: 63x + -63x = 0 -65x = 0 Divide each side by '-65'. x = 0 Simplifying x = 0
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