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Simplifying -7x + -21x + 49 = -7 Reorder the terms: 49 + -7x + -21x = -7 Combine like terms: -7x + -21x = -28x 49 + -28x = -7 Solving 49 + -28x = -7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + -28x = -7 + -49 Combine like terms: 49 + -49 = 0 0 + -28x = -7 + -49 -28x = -7 + -49 Combine like terms: -7 + -49 = -56 -28x = -56 Divide each side by '-28'. x = 2 Simplifying x = 2
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