Question

1,2 + 3у = 9 (у - 2,1) - 1,5

5/6(1/3х-1/5) =7х - 4( х - 5/6)​

Answer 1

Ответ:

1) y = 3.6

2) x = 4

Пошаговое объяснение:

1) 1,2 + 3у = 9 (у - 2,1) - 1,5

9(y - 2.1) - 1.5 = 9y - 18.9 - 1.5 = 9y - 20.4

1.2 + 3y = 9y - 20.4

3y - 9y = -1.2 - 20.4

-6y = -21.6

y = 3.6

2) 5/6(1/3х-1/5) =7х - 4(х - 5/6)​

5/6(1/3x - 1/5) = 5/18x - 1/6

5/18x - 1/6 = 7x - 4x + 5/6

5/18x - 7x = -4 5/6 + 1/6

-37/18x = -4 4/6

-37/18x = -22/3

x = 4