6.9^2=1.5^2+x

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Solution for 6.9^2=1.5^2+x equation: 



6.9^2=1.5^2+x

We move all terms to the left:

6.9^2-(1.5^2+x)=0

We add all the numbers together, and all the variables

-(1.5^2+x)+47.61=0

We get rid of parentheses

-x+47.61-1.5^2=0

We add all the numbers together, and all the variables

-1x+45.36=0

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

-x=-45.36

x=-45.36/-1

x=45+0.36/1

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