Need Help with this followingath problem

Question

A stationery store had an equal number of pens and notepads.

After 130 pens and 33 notepads sold, there were 4 times as many notepads as pens left.

How many pens were at the stationery store at first?

Answer 1

4(x-130) = x-43

4x - 520 = x - 43

3x - 520 = -43

3x = 477

x = 159

159 pens and notepad

after the sales:

29 pens and 126 notepads remain,

and 29*4 = 126

159