21-(2.5*x)=7.5

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Solution for 21-(2.5*x)=7.5 equation: 



21-(2.5x)=7.5

We move all terms to the left:

21-(2.5x)-(7.5)=0

We add all the numbers together, and all the variables

-(+2.5x)+21-(7.5)=0

We add all the numbers together, and all the variables

-(+2.5x)+13.5=0

We get rid of parentheses

-2.5x+13.5=0

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

-2.5x=-13.5

x=-13.5/-2.5

x=5+1/2.5

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