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Simplifying -7(6x + -7) + 7 = -42x + 56 Reorder the terms: -7(-7 + 6x) + 7 = -42x + 56 (-7 * -7 + 6x * -7) + 7 = -42x + 56 (49 + -42x) + 7 = -42x + 56 Reorder the terms: 49 + 7 + -42x = -42x + 56 Combine like terms: 49 + 7 = 56 56 + -42x = -42x + 56 Reorder the terms: 56 + -42x = 56 + -42x Add '-56' to each side of the equation. 56 + -56 + -42x = 56 + -56 + -42x Combine like terms: 56 + -56 = 0 0 + -42x = 56 + -56 + -42x -42x = 56 + -56 + -42x Combine like terms: 56 + -56 = 0 -42x = 0 + -42x -42x = -42x Add '42x' to each side of the equation. -42x + 42x = -42x + 42x Combine like terms: -42x + 42x = 0 0 = -42x + 42x Combine like terms: -42x + 42x = 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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