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Simplifying -78 + -10x = 90 + 2x Solving -78 + -10x = 90 + 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. -78 + -10x + -2x = 90 + 2x + -2x Combine like terms: -10x + -2x = -12x -78 + -12x = 90 + 2x + -2x Combine like terms: 2x + -2x = 0 -78 + -12x = 90 + 0 -78 + -12x = 90 Add '78' to each side of the equation. -78 + 78 + -12x = 90 + 78 Combine like terms: -78 + 78 = 0 0 + -12x = 90 + 78 -12x = 90 + 78 Combine like terms: 90 + 78 = 168 -12x = 168 Divide each side by '-12'. x = -14 Simplifying x = -14
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