Question

Линейные уравнения с одной переменной 1560. Найдите корни уравнений: 1) 2x - 5 - 8 + 1; 3) 7x + 6) - 4(5x + 4); 5) (x+9) = 3 2) 3(x - 5) = x + 3; 4) 1,5(x + 8) --4x+1; 6) (x + 8) = 2x +1. СРОЧНО 100 БАЛОВ​

Answer 1

Пошаговое объяснение:

2х - 5 = х + 1

2х - х = 1 + 5

х = 6

3(х - 5) = х + 3

3х - 15 = х + 3

3х - х = 3 + 15

2х = 18

х = 18 : 2

х = 9

7(х + 6) = 4(5х + 4)

7х + 42 = 20х + 16

7х - 20х = 16 - 42

-13х = -26

х = -26 : (-13)

х = 2

1,5(х + 8) = -4х + 1

1,5х + 12 = -4х + 1

1,5х + 4х = 1 - 12

5,5х = -11

х = -11 : 5,5

х = -2

1/6(х + 9) = -1/3х

1/6х + 9/6 = -1/3х

1/6х + 1/3х = -9/6

1/6х + 2/6х = -9/6

3/6х = -9/6

х = -9/6 : 3/6

х = -9/6 * 6/3

х = -3/1 * 1/1

х = -3/1

х = -3

3/4(х + 8) = 2х + 1

3/4х + 24/4 = 2х + 1

3/4х + 6 = 2х + 1

3/4х - 2х = 1 - 6

-1 1/4х = -5

-5/4х = -5

х = -5 : (-5/4)

х = -5 * (-4/5)

х = 20/5

х = 4