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Simplifying 55 = -7x + 2(-5x + -15) Reorder the terms: 55 = -7x + 2(-15 + -5x) 55 = -7x + (-15 * 2 + -5x * 2) 55 = -7x + (-30 + -10x) Reorder the terms: 55 = -30 + -7x + -10x Combine like terms: -7x + -10x = -17x 55 = -30 + -17x Solving 55 = -30 + -17x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17x' to each side of the equation. 55 + 17x = -30 + -17x + 17x Combine like terms: -17x + 17x = 0 55 + 17x = -30 + 0 55 + 17x = -30 Add '-55' to each side of the equation. 55 + -55 + 17x = -30 + -55 Combine like terms: 55 + -55 = 0 0 + 17x = -30 + -55 17x = -30 + -55 Combine like terms: -30 + -55 = -85 17x = -85 Divide each side by '17'. x = -5 Simplifying x = -5
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