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