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(2.5^2)+(1.5^2)=x
We move all terms to the left:
(2.5^2)+(1.5^2)-(x)=0
We add all the numbers together, and all the variables
-1x+8.5=0
We move all terms containing x to the left, all other terms to the right
-x=-8.5
x=-8.5/-1
x=8+0.5/1
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