Question

Розв'яжи рiвняння.
a) 3x-4=5x + 6;
6) 7(x-1)= 4(x + 2);
в) 7(x - 1) - 2(x + 3) = 2
СРОЧНО!даю 50 балів

Answer 1

а) 3x - 4 = 5x + 6

3x - 5x = 6 + 4

-2x = 10

x = 10/(-2)

x = -5

Ответ: x = -5

б) 7(x - 1) = 4(x + 2)

7x - 7 = 4x + 8

7x - 4x = 8 + 7

3x = 15

x = 15/3

x = 5

Ответ: x = 5

в) 7(x - 1) - 2(x + 3) = 2

7x - 7 - 2x - 6 = 2

7x - 2x = 2 + 7 + 6

5x = 15

x = 15/5

x = 3

Ответ: x = 3