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28+30=b-2.5
We move all terms to the left:
28+30-(b-2.5)=0
We add all the numbers together, and all the variables
-(b-2.5)+58=0
We get rid of parentheses
-b+2.5+58=0
We add all the numbers together, and all the variables
-1b+60.5=0
We move all terms containing b to the left, all other terms to the right
-b=-60.5
b=-60.5/-1
b=60+0.5/1
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