4000-x*8=160 4000-x*2=160 4000-x*4=160

Question

4000-x*8=160
4000-x*2=160
4000-x*4=160

Answer 1

1. -8х=160-4000
-8х=-3840
х=480
2. -2х=-3840
х=1920
3. -4х=-3840
х=960