Factors of 36, 1,2,3,4,6,9,12,18,36
Factors of 45- 1,3,5,9,15,45
The common factors or 36 and 45 are 1, 3 and 9.
Factors of 24- 1,2,3,4,6,8,12,24
Factors or 54- 1,2,3,6,9,18,27,54
The common factors of 24 and 54 are 1,2,3 and 6
Hope this helps
We want to reduce as many variable as we can so, we can obtain the value for the remaining variables.
Therefore, the first equation y=x+5 multiply it -2., you have -2y=-2x-10 and sum it to the second (2y-x=13), you will obtain the following: -x=13-2x-10.
You have x=3.
If you substitute x=3 in the first equation, you have y=8