To simplify the expression 9x + 3y − 6 − 5x + 4y −3, we can combine like terms.
Combine the x terms: 9x - 5x = 4x
Combine the y terms: 3y + 4y = 7y
Combine the constant terms: -6 - 3 = -9
The simplified expression is: 4x + 7y - 9
9x + 3y − 6 − 5x + 4y −3
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