Решите два уравнения: 1. 5/9 x + 17/9 = 2/9 x + 7/9 2. 2(x+2) - 4(x-3) = 5x + 9

Question

Решите два уравнения:

1. 5/9 x + 17/9 = 2/9 x + 7/9

2. 2(x+2) - 4(x-3) = 5x + 9

Answer 1

5/9х+17/9=2/9х+7/9
5/9х-2/9х=-17/9+7/9
3\9х=-10/9
х=-10/9:3\9
х=-3 1/3

Comments

2(x+2) - 4(x-3) = 5x + 9

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2х+4-4х-12=5х=9 ;2х-4х+4-12=5х+9;-2х+-8=5х+9;-2х-5х=8+9;-7х=17;х=17:(-7);х=-2 3/7