K+4-0.2=5 whats the anser for that ?

You are solving for k
k+4-.2=5
k+3.8=5
k=1.2

So assuming k is the placeholder
k+4-0.2=5
k+(4-0.2)=5
subtract (4-0.2) from both sdies
k=5-(4-0.2)
k=5-4+0.2
k=1+0.2
k=1.2