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