3 7х=9 July 8, 2019 16 32 64 128 3 7х 9 3 7х =- 9 28 7х 3 9х 8 3 3х 7х 9 4х 3 7х 9 4 3 5х 7х 9 7х 3 х 9 7х 3 2х 9 7х 3 2х х 9 3 7x=9
