0, 8( 100 – 0, 4x) = 8, 64
80-0.32х=8.64
-0.32х=8.64-80
-0.32х=-71.36
0.32х=71.63
х=223
0.8(100-0.4x)=8.64
80 - 0.32x = 8.64
-0.32x = 8.64+80
-0.32x = 88.64
-x = 277
x = -277
Пошаговое объяснение:
