Задание № 1. Решите уравнение: α) 7-2x=8; 8) 6x+11=9; β) 5x+7=3x+8; г) 6х-5=-2-3х; д) 5(4-3x) -9=6; e) 3x-(7-6x) = -4;

Ответ: а) x = -0.5; б) x = -1/3; в) x = 0.5; г) x = 0.75; д) x = 1/3; e) x = 11/9

а) 7 - 2x = 8

-2x = 8 - 7

-2x = 1

x = -1/2 = -0.5

б) 6x + 11 = 9

6x = 9 - 11

6x = -2

x = -2/6 = -1/3

в) 5x + 7 = 3x + 8

5x - 3x = 8 - 7

2x = 1

x = 1/2 = 0.5

г) 6x - 5 = -2 - 3x

6x + 3x = -2 + 5

9x = 3

x = 3/9 = 1/3

д) 5(4 - 3x) - 9 = 6

20 - 15x - 9 = 6

-15x = 6 - 20 + 9

-15x = -5

x = -5 / -15 = 1/3

e) 3x - (7 - 6x) = -4

3x - 7 + 6x = -4

9x = -4 + 7

9x = 3

x = 3/9 = 1/3

Ответ: а) x = -0.5; б) x = -1/3; в) x = 0.5; г) x = 0.75; д) x = 1/3; e) x = 11/9