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saul85 [17]
4 years ago
6

7*9=(7*10)-7*A) what is the value of A

Mathematics
1 answer:
Aliun [14]4 years ago
7 0
7*9=(7*10)-7*a
    63 = 70-7a
   -70    -70
-7=-7a
-7/-7 =1
1=a
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