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Simplifying 7x(5x + 10) = 7x(5x + 10) Reorder the terms: 7x(10 + 5x) = 7x(5x + 10) (10 * 7x + 5x * 7x) = 7x(5x + 10) (70x + 35x2) = 7x(5x + 10) Reorder the terms: 70x + 35x2 = 7x(10 + 5x) 70x + 35x2 = (10 * 7x + 5x * 7x) 70x + 35x2 = (70x + 35x2) Add '-70x' to each side of the equation. 70x + -70x + 35x2 = 70x + -70x + 35x2 Combine like terms: 70x + -70x = 0 0 + 35x2 = 70x + -70x + 35x2 35x2 = 70x + -70x + 35x2 Combine like terms: 70x + -70x = 0 35x2 = 0 + 35x2 35x2 = 35x2 Add '-35x2' to each side of the equation. 35x2 + -35x2 = 35x2 + -35x2 Combine like terms: 35x2 + -35x2 = 0 0 = 35x2 + -35x2 Combine like terms: 35x2 + -35x2 = 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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