3(k-3.8)=-4.2(k-3.9)

Solution for 3(k-3.8)=-4.2(k-3.9) equation:

3(k-3.8)=-4.2(k-3.9)

We move all terms to the left:

3(k-3.8)-(-4.2(k-3.9))=0

We multiply parentheses

3k-(-4.2(k-3.9))-11.4=0


We calculate terms in parentheses: -(-4.2(k-3.9)), so:

-4.2(k-3.9)

We multiply parentheses

-4.2k+16.38

Back to the equation:

-(-4.2k+16.38)


We get rid of parentheses

3k+4.2k-16.38-11.4=0

We add all the numbers together, and all the variables

7.2k-27.78=0

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

7.2k=27.78

k=27.78/7.2

k=3+5.2372881355932/6.1016949152542