79=(710)-7*A) what is the value of A

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