6,97x-13,2x)•(-1 11/89)=-5 2/9-3 1/3
1) 6,97х -13,2х = - 6,23х
2)-6,23х *(-1 11/89) = -6 23/100х * ( - 100/89)= - 623/100х * (-100/89) = 7х
3) -5 2/9 - 3 1/3 = - 8 5/9
4) 7х = -8 5/9
7х = - 77/9
х = - 77/9 : 7 = - 77/9 * 1/7
х = - 11/9 = - 1 2/9
