Answer :
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
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