Answer:
Well the answer would be 9.
Explanation:
All you have to do is put 6 in the place of X. So the new equation would be 5x2+6-7, and all you do is solve that. So multiply 5 and 2 to get 10, than add 10 to 6 and get 16, 16 minus 7 to get your answer of 9.
Hope this is right, pls tell me and sorry its so late lol