Пошаговое объяснение:
x/y=7.8
x/(y-10)=7.8+1.5
y=x/7.8
x/(x/7.8-10)=7.8+1.5
x/7.8-10=x/(7.8+1.5)
x/7.8-10=x/9.3
x/7.8-x/9.3=10
31x/241.8-26x/241.8=10
5x/241.8=10
5x=10*241.8
5x=2418
x=2418/5
x=483,6 км
Пошаговое объяснение:
x/y=7.8
x/(y-10)=7.8+1.5
y=x/7.8
x/(x/7.8-10)=7.8+1.5
x/7.8-10=x/(7.8+1.5)
x/7.8-10=x/9.3
x/7.8-x/9.3=10
31x/241.8-26x/241.8=10
5x/241.8=10
5x=10*241.8
5x=2418
x=2418/5
x=483,6 км