To simplify the expression, we first remove the parentheses.
(4x + 9y) - (11x - 3y + 7)
= 4x + 9y - 11x + 3y - 7
= (4x - 11x) + (9y + 3y) - 7
= -7x + 12y - 7
Simplify the expression.
(4x + 9y) - (11x - 3y +7)
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