3(1.2b-1)-3.6=4.2

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Solution for 3(1.2b-1)-3.6=4.2 equation: 



3(1.2b-1)-3.6=4.2

We move all terms to the left:

3(1.2b-1)-3.6-(4.2)=0

We add all the numbers together, and all the variables

3(1.2b-1)-7.8=0

We multiply parentheses

3b-3-7.8=0

We add all the numbers together, and all the variables

3b-10.8=0

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

3b=10.8

b=10.8/3

b=3+1/1.66666666667

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