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Simplifying -2x + -3(-3x + 9) = -90 Reorder the terms: -2x + -3(9 + -3x) = -90 -2x + (9 * -3 + -3x * -3) = -90 -2x + (-27 + 9x) = -90 Reorder the terms: -27 + -2x + 9x = -90 Combine like terms: -2x + 9x = 7x -27 + 7x = -90 Solving -27 + 7x = -90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + 7x = -90 + 27 Combine like terms: -27 + 27 = 0 0 + 7x = -90 + 27 7x = -90 + 27 Combine like terms: -90 + 27 = -63 7x = -63 Divide each side by '7'. x = -9 Simplifying x = -9
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