4 1 2х )- 7 3х 12 July 8, 2019 16 32 64 128 4 1/2 + 1 1/3 4 7х-1 2х=4 34 4 7х-1 8=3 2+2 2х 4×(1 2х+3 7)=2 8 4/7х = 1
