Помогите пожалуйста: 1) -3 (4-5y) + 2 (3-6y) = - 3,9; 2)0,4 (x- 3) - 1,6 = (0,1x -...

Question

Помогите пожалуйста:

1) -3 (4-5y) + 2 (3-6y) = - 3,9;

2)0,4 (x- 3) - 1,6 = (0,1x - 0,5);

3)0,3m + 2 (o,2m - 0,3) = 0,8 - 0,7(m-2);

4)1,5(2x-5) + 2x=5(0,5x - 1,5) + 13,5;

Answer 1

1) -3 (4-5y) + 2 (3-6y) = - 3,9;

-12 + 15y + 6 - 12y = -3.9

3y=2.1

y=0.7

 

2)0,4 (x- 3) - 1,6 = (0,1x - 0,5);

0.4x - 1.2 - 1.6 = 0.1x - 0.5

0.3x = 2.3

x=23/3

 

3)0,3m + 2 (o,2m - 0,3) = 0,8 - 0,7(m-2);

  0.3m + 0.4m - 0.6 = 0.8 - 0.8m + 1.4

  1.5m = 2.8

m=28/15

 

4)1,5(2x-5) + 2x=5(0,5x - 1,5) + 13,5;

 3x - 7.5 + 2x = 2.5x - 7.5 + 13.5

12.5x = 13.5

x=27/25

Answer 2

1) - 12 + 15Y + 6 - 12Y = - 3.9

3Y = -3.9 + 12 - 6

3Y = 2.1

Y = 0.7

2) 0.4X - 1.2 - 1.6 = 0.1X - 0.5

0.3X = - 0.5 + 1.2 + 1.6

0.3X = 2.3

X = 23\3

X = 7 2\3

3) 0.3M + 0.4M - 0.6 = 0.8 - 0.7M + 1.4

0.7M - 0.6 = 2.2 - 0.7M

1.4M = 2.8

M = 2

4) 3X - 7.5 + 2X = 2.5X - 7.5 + 13.5

5X - 7.5 = 2.5X + 6

2.5X = 13.5

X = 5.4