Hi everyone,

I am trying to change hundreds of data files using sed command. Text file1 have 10 lines which look like the following

{ x=34280; y...}

{ x=34281; y...}

{ x=34282; y...}

{ x=34283; y...}

{ x=34284; y...}

{ x=34285; y...}

{ x=34286; y...}

{ x=34287; y...}

{ x=34288; y...}

{ x=34289; y...}

What I like to do is to add 10 times j to each of the x values and print it to the same text file. Here is my trial:

```
#!/bin/bash
for (( i = 0 ; i <= 9; i++ ))
do
j=1
sed -e 's/'3428$i'/`'3428$i'+10*j`/g' file1 > file1_new
mv file1_new file1
done
```

What I am getting is:

`{ x=34280+10*j`

instead.

any suggestion?