a7=a7-1+4

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Solution for a7=a7-1+4 equation: 



a7=a7-1+4

We move all terms to the left:

a7-(a7-1+4)=0

We add all the numbers together, and all the variables

-(+a^7-1+4)+a7=0

We add all the numbers together, and all the variables

a^7-(+a^7-1+4)=0

We get rid of parentheses

a^7-a^7+1-4=0

We do not support eapression: a^7

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