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Simplifying 9y + 3(-3y + 42) = 126 Reorder the terms: 9y + 3(42 + -3y) = 126 9y + (42 * 3 + -3y * 3) = 126 9y + (126 + -9y) = 126 Reorder the terms: 126 + 9y + -9y = 126 Combine like terms: 9y + -9y = 0 126 + 0 = 126 126 = 126 Add '-126' to each side of the equation. 126 + -126 = 126 + -126 Combine like terms: 126 + -126 = 0 0 = 126 + -126 Combine like terms: 126 + -126 = 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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