Choose the letter with the problems same as yours. Talk about your problem(s) with your partner using some words from the letter.

(6,97х-13,2х)*(1 11/89)=-5 2/9 - 3 1/3
-6,23х*100/89=-8 5/9
-6,23х=-77/9*89/100
-6,23х=-6853/900
х=-6853/900*(-100/623)
х=11/9
х=1 2/9