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Simplifying 20y + 7 = 20y + -1(-2) + 5 Reorder the terms: 7 + 20y = 20y + -1(-2) + 5 Multiply -1 * -2 7 + 20y = 20y + 2 + 5 Reorder the terms: 7 + 20y = 2 + 5 + 20y Combine like terms: 2 + 5 = 7 7 + 20y = 7 + 20y Add '-7' to each side of the equation. 7 + -7 + 20y = 7 + -7 + 20y Combine like terms: 7 + -7 = 0 0 + 20y = 7 + -7 + 20y 20y = 7 + -7 + 20y Combine like terms: 7 + -7 = 0 20y = 0 + 20y 20y = 20y Add '-20y' to each side of the equation. 20y + -20y = 20y + -20y Combine like terms: 20y + -20y = 0 0 = 20y + -20y Combine like terms: 20y + -20y = 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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