It depends how much she begins with but if she doesn’t begin with any then it’d be 2.5
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x + 2x + 9y - 7y
3x + ( 9y - 7y )
3x + 2y
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Answer:
Step-by-step explanation:
12.3 + 9.6 = 21.9
Answer:
-12
Step-by-step explanation:
We start with the equation: 
Substitute the variables: 
Solve using order of operations (start with multiplication): 
And then addition/subtration: 