Question

a) 2 (x-5)=9;
r) 1-5 (2-3x) = 6;
x) 2x - (7 + x) = 2;​

Answer 1

Ответ:

2х-10=9

2х=9-10

2х=-1

×=0.5

1-10-15х=6

-15х=6-1+10

-15х=15

х=-1

14х-4х=2

10х=2

х=5

Answer 2

$1)\\2(x - 5) = 9\\\\2x - 10 = 9\\\\2x = 9 + 10\\\\2x = 19$ Ответ : $x = \frac{19}{2}$

$2)\\1 - 5(2 - 3x) = 6\\\\1 - 10 + 15x = 6\\\\-9 + 15x = 6\\\\15x = 6 + 9\\\\15x = 15$ Ответ : x = 1

$3)\\2x - (7 + x) = 2\\\\2x - 7 - x = 2\\\\x - 7 = 2\\\\x = 2 + 7$ Ответ : x = 9