Answer:
I think it is b hopes this helps.
Associative property of addition
30x-15
Step-by-step explanation:
9x+6-4x=4x+7
5x+6=4x+7
-6 -6
5x=4x+1
-4x -4x
x=1
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hope it helps
She will raise 6 dollars a week and the total donation will be 600 dollars.