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9/2.5=b
We move all terms to the left:
9/2.5-(b)=0
We add all the numbers together, and all the variables
-1b+9/2.5=0
We multiply all the terms by the denominator
-1b*2.5+9=0
Wy multiply elements
-2.5b+9=0
We move all terms containing b to the left, all other terms to the right
-2.5b=-9
b=-9/-2.5
b=3+1/1.6666666666667
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