15*(c-8x)=75 при x=53

Question

15*(c-8x)=75 при x=53

Answer 1

15(c-8x)=75
15(c-8*53)=75
15(c-424)=75
c-424=75:15
c-424=5
c=5+424
c=429

Answer 2

15с-120х=75
..................................