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Simplifying 3(-5x + -7) + -2x = 81 Reorder the terms: 3(-7 + -5x) + -2x = 81 (-7 * 3 + -5x * 3) + -2x = 81 (-21 + -15x) + -2x = 81 Combine like terms: -15x + -2x = -17x -21 + -17x = 81 Solving -21 + -17x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -17x = 81 + 21 Combine like terms: -21 + 21 = 0 0 + -17x = 81 + 21 -17x = 81 + 21 Combine like terms: 81 + 21 = 102 -17x = 102 Divide each side by '-17'. x = -6 Simplifying x = -6
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