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Simplifying 15x + 7 = 3(3 + 5x) + -2 Reorder the terms: 7 + 15x = 3(3 + 5x) + -2 7 + 15x = (3 * 3 + 5x * 3) + -2 7 + 15x = (9 + 15x) + -2 Reorder the terms: 7 + 15x = 9 + -2 + 15x Combine like terms: 9 + -2 = 7 7 + 15x = 7 + 15x Add '-7' to each side of the equation. 7 + -7 + 15x = 7 + -7 + 15x Combine like terms: 7 + -7 = 0 0 + 15x = 7 + -7 + 15x 15x = 7 + -7 + 15x Combine like terms: 7 + -7 = 0 15x = 0 + 15x 15x = 15x Add '-15x' to each side of the equation. 15x + -15x = 15x + -15x Combine like terms: 15x + -15x = 0 0 = 15x + -15x Combine like terms: 15x + -15x = 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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