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Simplifying -9x + -77 = 21 + -2x Reorder the terms: -77 + -9x = 21 + -2x Solving -77 + -9x = 21 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -77 + -9x + 2x = 21 + -2x + 2x Combine like terms: -9x + 2x = -7x -77 + -7x = 21 + -2x + 2x Combine like terms: -2x + 2x = 0 -77 + -7x = 21 + 0 -77 + -7x = 21 Add '77' to each side of the equation. -77 + 77 + -7x = 21 + 77 Combine like terms: -77 + 77 = 0 0 + -7x = 21 + 77 -7x = 21 + 77 Combine like terms: 21 + 77 = 98 -7x = 98 Divide each side by '-7'. x = -14 Simplifying x = -14
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