Hello! To solve this problem, we need to get w by itself.
61 = 4w + 13
First, subtract 13 on both sides.
61 - 13 = 4w + 13 - 13
48 = 4w
Now, we divide both sides by 4 to get rid of the 4 attached to the w.
48/4 = 4w/4
12 = w
Hope this helps, and let me know if you have any other questions! :)