Question

помогите пожалуйста

Answer 1

(5x/6)+7=(5x/9)-5 (5x/6)-(5x/9)=-5-7 (45x/54)-(30x/54)=-12 (15x/54)=-12 15x=-12*54 15x=-648 x=-43,2

Answer 2

проверку сделай

Answer 3

Ну ок .( (5*(-43,2))/6) + 7 =((5*(-43,2))/9)-5 =>(-216/6)+7=(-216/9)-5 => -36+7=-24-5 => -29=-29

Answer 4

5/6х-5/9х=-5-7 15/18х-10/18=-12 5/18=-12 х=-12:5/18=216/5=216:5 х=-43.2