Question

Найдите корень уравнения -4y-28=-44    0.5b-0.2=-5.7.    -0.6x-2.3=4.3     -7x-28=-3x-52     0.9b-0.5=9.4     1-0.1d=2.1

Answer 1

1.  -4y-28=-44  

- 28 + 44 = 4у

4у = 16

у = 4 

 

2.  0.5b-0.2=-5.7.    

0.5b = -5.7 + 0.2

0.5b = -5.5

b= -11

 

3.   -0.6x-2.3=4.3

-0.6x = 4.3 + 2.3

-0.6x = 6.6

 x = -11

 

 4. -7x-28=-3x-52

-7x + 3x = - 52 + 28

10x = 24

x = 2.4

 

5. 0.9b-0.5=9.4

0.9b= 9.4 + 0.5

0.9b=9.9

b=11

 

6. 1-0.1d=2.1

-0.1d=2.1-1

-0.1d=1.1

d = -11

 

:)