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Simplifying 7(2y + -3) = 10y + -21 + 4y Reorder the terms: 7(-3 + 2y) = 10y + -21 + 4y (-3 * 7 + 2y * 7) = 10y + -21 + 4y (-21 + 14y) = 10y + -21 + 4y Reorder the terms: -21 + 14y = -21 + 10y + 4y Combine like terms: 10y + 4y = 14y -21 + 14y = -21 + 14y Add '21' to each side of the equation. -21 + 21 + 14y = -21 + 21 + 14y Combine like terms: -21 + 21 = 0 0 + 14y = -21 + 21 + 14y 14y = -21 + 21 + 14y Combine like terms: -21 + 21 = 0 14y = 0 + 14y 14y = 14y Add '-14y' to each side of the equation. 14y + -14y = 14y + -14y Combine like terms: 14y + -14y = 0 0 = 14y + -14y Combine like terms: 14y + -14y = 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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