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Simplifying 7x + 5(x + -7) = -155 Reorder the terms: 7x + 5(-7 + x) = -155 7x + (-7 * 5 + x * 5) = -155 7x + (-35 + 5x) = -155 Reorder the terms: -35 + 7x + 5x = -155 Combine like terms: 7x + 5x = 12x -35 + 12x = -155 Solving -35 + 12x = -155 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + 12x = -155 + 35 Combine like terms: -35 + 35 = 0 0 + 12x = -155 + 35 12x = -155 + 35 Combine like terms: -155 + 35 = -120 12x = -120 Divide each side by '12'. x = -10 Simplifying x = -10
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