Pete thinks of a number. he squares it, then takes away 5, next multiplies it by 4, takes away 7, divides it by 3 and finally adds 6. his answer is 45. what number did he start with?

The answer you is looking for is 6.

This is the equation this problem would make:
?^2-5*4-7/3+6=45

Since you know the answer, you can find a missing number by choosing the opposite symbol:
?/6+5/4+7*3-6=45

This is how you work backwards with this problem:
45-6= 39
39*3= 117
117+7= 124
124/4= 31
31+5= 36
36/6= 6

When you square root, you are taking the two numbers and multiplying then together. These numbers need to be the same, though. For example, 6*6=36, 6 squared=36.

If you put 6 where the ? is, your answer will be 45:
6^2-5*4-7/3+6=45

4038 is the answer lol just use a calculator