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Simplifying -7x + -126 = -7(x + 18) Reorder the terms: -126 + -7x = -7(x + 18) Reorder the terms: -126 + -7x = -7(18 + x) -126 + -7x = (18 * -7 + x * -7) -126 + -7x = (-126 + -7x) Add '126' to each side of the equation. -126 + 126 + -7x = -126 + 126 + -7x Combine like terms: -126 + 126 = 0 0 + -7x = -126 + 126 + -7x -7x = -126 + 126 + -7x Combine like terms: -126 + 126 = 0 -7x = 0 + -7x -7x = -7x Add '7x' to each side of the equation. -7x + 7x = -7x + 7x Combine like terms: -7x + 7x = 0 0 = -7x + 7x Combine like terms: -7x + 7x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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