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Simplifying -4x + -7(5x + -7) = 49 + -39x Reorder the terms: -4x + -7(-7 + 5x) = 49 + -39x -4x + (-7 * -7 + 5x * -7) = 49 + -39x -4x + (49 + -35x) = 49 + -39x Reorder the terms: 49 + -4x + -35x = 49 + -39x Combine like terms: -4x + -35x = -39x 49 + -39x = 49 + -39x Add '-49' to each side of the equation. 49 + -49 + -39x = 49 + -49 + -39x Combine like terms: 49 + -49 = 0 0 + -39x = 49 + -49 + -39x -39x = 49 + -49 + -39x Combine like terms: 49 + -49 = 0 -39x = 0 + -39x -39x = -39x Add '39x' to each side of the equation. -39x + 39x = -39x + 39x Combine like terms: -39x + 39x = 0 0 = -39x + 39x Combine like terms: -39x + 39x = 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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