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Simplifying 30 + -1(8 + -1(2y + 8)) = 2y + 30 Reorder the terms: 30 + -1(8 + -1(8 + 2y)) = 2y + 30 30 + -1(8 + (8 * -1 + 2y * -1)) = 2y + 30 30 + -1(8 + (-8 + -2y)) = 2y + 30 Combine like terms: 8 + -8 = 0 30 + -1(0 + -2y) = 2y + 30 30 + -1(-2y) = 2y + 30 Remove parenthesis around (-2y) 30 + -1 * -2y = 2y + 30 Multiply -1 * -2 30 + 2y = 2y + 30 Reorder the terms: 30 + 2y = 30 + 2y Add '-30' to each side of the equation. 30 + -30 + 2y = 30 + -30 + 2y Combine like terms: 30 + -30 = 0 0 + 2y = 30 + -30 + 2y 2y = 30 + -30 + 2y Combine like terms: 30 + -30 = 0 2y = 0 + 2y 2y = 2y Add '-2y' to each side of the equation. 2y + -2y = 2y + -2y Combine like terms: 2y + -2y = 0 0 = 2y + -2y Combine like terms: 2y + -2y = 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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