It is: 9a-a-a = 7a
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usually in algerbra or algerbra 1 a variable
Yes.
with algerbra you have to times the number and the letter together if they are next to each other without a gap inbetween..... so, n=4 25x4=100 hope this helps
Algerbra
they are letters in math like algerbra example AxA=b