3.5/4.2=b/12

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Solution for 3.5/4.2=b/12 equation:


3.5/4.2=b/12

We simplify the equation to the form, which is simple to understand 
3.5/4.2=b/12

We move all terms containing b to the left and all other terms to the right. 
-0.083333333333333b=-0.83333333333333

We simplify left and right side of the equation. 
-0.083333333333333b=-0.83333333333333

We divide both sides of the equation by -00.083333333333333 to get b. 
b=10

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