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1/2(15+13)=x
We move all terms to the left:
1/2(15+13)-(x)=0
We add all the numbers together, and all the variables
-x+1/228=0
We add all the numbers together, and all the variables
-1x+1/228=0
We multiply all the terms by the denominator
-1x*228+1=0
Wy multiply elements
-228x+1=0
We move all terms containing x to the left, all other terms to the right
-228x=-1
x=-1/-228
x=1/228
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