5/14z-1/3z+1/7z=1/4

Решите уравнение

5/14z-1/3z+1/7z=1/4 1/6z=1/4 z=1/4:1/6 z=1/4*6/1 z=6/4 z=3/2 z=1,5 Ответ : z = 1,5

(5/14) z - (1/3) z + (1/7) z = 1/4

Общий знаменатель 56

(5/14) z + (2/14) z - (1/3) z = 1/4

(1/2) z - (1/3) z = 1/4

(3/6) z - (2/6) z = 1/4

(1/6) z = 1/4

z = (1/4) : (1/6)

z = 6/4

z = 1,5

Ответ 1,5