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Simplifying -84 + -5x = -21 + 2x Solving -84 + -5x = -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. -84 + -5x + -2x = -21 + 2x + -2x Combine like terms: -5x + -2x = -7x -84 + -7x = -21 + 2x + -2x Combine like terms: 2x + -2x = 0 -84 + -7x = -21 + 0 -84 + -7x = -21 Add '84' to each side of the equation. -84 + 84 + -7x = -21 + 84 Combine like terms: -84 + 84 = 0 0 + -7x = -21 + 84 -7x = -21 + 84 Combine like terms: -21 + 84 = 63 -7x = 63 Divide each side by '-7'. x = -9 Simplifying x = -9
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