Question

i need help in solving this
0.8+0.2(y-1)=1.8

Answer 1

I think step 1 should be to expand / distribute the bracket:
a(b+c) = a*b + a*c
\(\Rightarrow\) 0.2(y-1) = ?

Answer 2

if you get stuck multiply everything by 5

Answer 3

maybe you will see it better

Answer 4

4+y-1=9
y=6