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