Объяснение:
x*(1+0.15)*(1-0.2)=x-480
x*1.15*0.8=x-480
x*0.92=x-480
0.92x=x-480
0.92x-x=-480
-0.08x=-480
x=-480/(-0.08)
x=6000
Объяснение:
x*(1+0.15)*(1-0.2)=x-480
x*1.15*0.8=x-480
x*0.92=x-480
0.92x=x-480
0.92x-x=-480
-0.08x=-480
x=-480/(-0.08)
x=6000