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Simplifying -7(6x + -1) = -42x + 7 Reorder the terms: -7(-1 + 6x) = -42x + 7 (-1 * -7 + 6x * -7) = -42x + 7 (7 + -42x) = -42x + 7 Reorder the terms: 7 + -42x = 7 + -42x Add '-7' to each side of the equation. 7 + -7 + -42x = 7 + -7 + -42x Combine like terms: 7 + -7 = 0 0 + -42x = 7 + -7 + -42x -42x = 7 + -7 + -42x Combine like terms: 7 + -7 = 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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