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Simplifying 3y + -1(y + -7) = 5 + 2y + 2 Reorder the terms: 3y + -1(-7 + y) = 5 + 2y + 2 3y + (-7 * -1 + y * -1) = 5 + 2y + 2 3y + (7 + -1y) = 5 + 2y + 2 Reorder the terms: 7 + 3y + -1y = 5 + 2y + 2 Combine like terms: 3y + -1y = 2y 7 + 2y = 5 + 2y + 2 Reorder the terms: 7 + 2y = 5 + 2 + 2y Combine like terms: 5 + 2 = 7 7 + 2y = 7 + 2y Add '-7' to each side of the equation. 7 + -7 + 2y = 7 + -7 + 2y Combine like terms: 7 + -7 = 0 0 + 2y = 7 + -7 + 2y 2y = 7 + -7 + 2y Combine like terms: 7 + -7 = 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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