b-4.2=7.5

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Solution for b-4.2=7.5 equation: 



b-4.2=7.5

We move all terms to the left:

b-4.2-(7.5)=0

We add all the numbers together, and all the variables

b-11.7=0

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

b=11.7

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