miscroscopes
The instrument is an optical microscope.
microscope
A doctor
A doctor
microscope
-15x=-5*3x+2 -15x=-15x+2 +15x +15x ----------------- 0=2
well, it starts from 5k upto 20 or 25k..
35x + 15x = 50x
15x-16x = -1
-9y-15x ---- -3
GCD(15x, 24x) = 3x