a-21/2=21/2

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Solution for a-21/2=21/2 equation: 



a-21/2=21/2

We move all terms to the left:

a-21/2-(21/2)=0

We add all the numbers together, and all the variables

a-21/2-(+21/2)=0

We get rid of parentheses

a-21/2-21/2=0

We multiply all the terms by the denominator


a*2-21-21=0

We add all the numbers together, and all the variables

a*2-42=0

Wy multiply elements

2a-42=0

We move all terms containing a to the left, all other terms to the right

2a=42

a=42/2

a=21

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