Which expression is equivalent to open paren negative 4 y minus x close paren minus open paren 3 y minus 9 x close paren ?

Distribute the subtraction across the second set of parentheses: (-4y - x) - (3y - 9x) = -4y - x - 3y + 9x. Combine like terms to get -7y + 8x, which matches “negative 7 y plus 8 x.”

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