Найдите корень уравнения * + 3/7=2*-1/5

(х + 3) / 7 = (2 х - 1) / 5,

5 * (х + 3) = 7 * (2 х - 1),

5 х + 15 = 14 х - 7,

5 х - 14 х = - 7 - 15,

-9 х = - 22,

х = - 22 : (-9),

х = 22/9,

х = 2 4/9,

проверка:

(22/9 + 3) / 7 = (2*22/9 - 1) / 5,

(22/9 + 27/9) / 7 = (44/9 - 9/9) / 5,

49/9 / 7 = 35/9 / 5,

49/9 * 1/7 = 35/9 * 1/5,

7/9 = 7/9