Question

1 upon A minus 1 + 3 upon 3 minus 1 equals to zero​

Answer 1

1/A- 1+3/3-1=o ok

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Answer 2

1/a-(1+3/3-1)=0

1/a-(4/2)=0

1/a- 2= 0

1/a = 2

2a = 1

or a = 1/2 or 0.5