Question

-2х+16=5х-19
4(3-2х)+24=2(3+2х)
15-3(х-8)=3

Answer 1

Ответ:

$- 2x + 16 = 5x - 19 \\ - 2x - 5x = - 19 - 16 \\ - 7x = - 35 \\ x = ( - 35) \div ( - 7) \\ x = 5 \\ \\ 4(3 - 2x) + 24 = 2(3 + 2x) \\ 12 - 8x + 24 = 6 + 4x \\ - 8x - 4x = 6 - 12 - 24 \\ - 12x = - 30 \\ x = ( - 30) \div ( - 12) \\ x = \frac{30}{12} = \frac{15}{6} = \frac{5}{2} = 2 \frac{1}{2} = 2.5 \\ \\ 15 - 3(x - 8) = 3 \\ 15 - 3x + 24 = 3 \\ - 3x = 3 - 15 - 24 \\ - 3x = - 12 - 24 \\ - 3x = - 36 \\ x = ( - 36) \div ( - 3) \\ x = 12$

Answer 2

1) -2х + 16 = 5х - 19

- 2х - 5х = - 19 - 16

- 7х = - 35 / ÷ ( - 7 )

х = 5

2) 4 ( 3 - 2х ) + 24 = 2 ( 3 + 2х )

12 - 8х + 24 = 6 + 4х

36 - 8х = 6 + 4х

- 8х - 4х = 6 - 36

- 12х = - 30 / ÷ ( - 12 )

х = 2,5

3) 15 - 3 ( х - 8 ) = 3

15 - 3х + 24 = 3

39 - 3х = 3

- 3х = 3 - 39

- 3х = - 36 / ÷ ( -3 )

х = 12