Question

[(x+260)×3+4]×5=1985 cat e x

Answer 1

[(x+260)*3+4]*5=1985
[(x+260)*3+4]=1985:5
[x+260]*3=397-4
x+260=393:3
x=131-260
x=-129

Answer 2

[(x+260)×3+4]×5=1985
(x+260)×3+4=1985÷5
(x+260)×3+4=397
(x+260)×3=397-4
(x+260)×3=393
x+260=393÷3
x=131-260
x= -129