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Simplifying 4x + 7 = -123 + -9x Reorder the terms: 7 + 4x = -123 + -9x Solving 7 + 4x = -123 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. 7 + 4x + 9x = -123 + -9x + 9x Combine like terms: 4x + 9x = 13x 7 + 13x = -123 + -9x + 9x Combine like terms: -9x + 9x = 0 7 + 13x = -123 + 0 7 + 13x = -123 Add '-7' to each side of the equation. 7 + -7 + 13x = -123 + -7 Combine like terms: 7 + -7 = 0 0 + 13x = -123 + -7 13x = -123 + -7 Combine like terms: -123 + -7 = -130 13x = -130 Divide each side by '13'. x = -10 Simplifying x = -10
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