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Simplifying -7(7x + -9) + 6 = -49x + 69 Reorder the terms: -7(-9 + 7x) + 6 = -49x + 69 (-9 * -7 + 7x * -7) + 6 = -49x + 69 (63 + -49x) + 6 = -49x + 69 Reorder the terms: 63 + 6 + -49x = -49x + 69 Combine like terms: 63 + 6 = 69 69 + -49x = -49x + 69 Reorder the terms: 69 + -49x = 69 + -49x Add '-69' to each side of the equation. 69 + -69 + -49x = 69 + -69 + -49x Combine like terms: 69 + -69 = 0 0 + -49x = 69 + -69 + -49x -49x = 69 + -69 + -49x Combine like terms: 69 + -69 = 0 -49x = 0 + -49x -49x = -49x Add '49x' to each side of the equation. -49x + 49x = -49x + 49x Combine like terms: -49x + 49x = 0 0 = -49x + 49x Combine like terms: -49x + 49x = 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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