**Question is solve the simultaneous equations**

7x7x

__=__3mod34 and x__=__7mod41I've solved the first one to get x

__=__15mod 34 hence x= 34u+15

The second is x

__=__7 mod 41

Thus I've put 34u+15

__=__7mod 41

Now at this point I thought it would go to 34u

__=__33mod41 but if this is the case then I'm struggling to solve for u. I think I've made a mistake at 34u+15

__=__7 mod 41 but not sure what.