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Simplifying 6x + -1(7 + -1x) + 8 = 7x + 1 6x + (7 * -1 + -1x * -1) + 8 = 7x + 1 6x + (-7 + 1x) + 8 = 7x + 1 Reorder the terms: -7 + 8 + 6x + 1x = 7x + 1 Combine like terms: -7 + 8 = 1 1 + 6x + 1x = 7x + 1 Combine like terms: 6x + 1x = 7x 1 + 7x = 7x + 1 Reorder the terms: 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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