Question

помоите плз срочно надо​

Answer 1

Ответ:

Пошаговое объяснение:

1)

7*(5 - x) = 2*(3 + x)

35 - 7x = 6 + 2x

2x + 7x = 35 - 6

9x = 29

x = 29 : 9

x = 3 2/9

2)

3,36*(x + 4) = 7*6

3,36x + 13,44 = 42

3,36x = 42 - 13,44

3,36x = 28,56

x = 28,56 : 3,36

x = 8,5

3)

2,8*(-3 + x) = 8,4*5,2

-8,4 + 2,8x = 43,68

2,8x = 43,68 + 8,4

2,8x = 52,08

x = 52,08 : 2,8

x = 18,6

Answer 2

1) 2*(3+х) =7 *(5-х)    

6+2х = 35 - 7х

2х + 7х = 35 - 6

9х = 29

х = 29 : 9

х = 3 2/9

2) (х+4) * 3,36 = 42

3,36х + 13,44 = 42

3,36х = 28,56

х = 8,5

3) 2,8 * (х - 3) = 5,2 * 8,4

х - 3 = 5,2 * 3

х = 15,6 + 3

х = 18,6