Ray has $30 saved and saves $2 a week and Joe has $90 saved and spends $4 a week when will they have the same amount of money saved?

This question are you saying that Joe spends 4 dollars or do you mean saves 4 dollars

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.