Question

Решите уравнения пожалуйста,срочно. 1) 5(x-4) = x+8 2) 9-7(x+3)= 5-6x 3) (7x+9) - (11x-7)=8 4) 3,6+5y=7(1,2-y) 5) 0,4 (6-4t)=1,9-0,5(3t-7) 6) 3/4 * (1/4 x - 1/3)= 3x - 11 целых 1/2 (Если что 3/4 1/4 1/3 11 целых 1/2 это дроби с числителем и знаменателем)

Answer 1

1) 5x-20=x+8

5x-x=8+20

4x=28

x=7

2) 9-7x-21=5-6x

6x-7x=5+21-9

-x=17

x=-17

3) 7x+9-11x+7=8

-4x=8-9

-4x=-1

x=1/4

4) 3,6+5y=8,4-7y

5y+7y=8,4-3,6

12y=4,8

y=0,4

5)2,4-1,6t=1,9-1,5t+3,5

1,5t-1,6t=1,9+3,5-2,4

-0,1t=3

t=-30

6) 3/16 x-1/4=3x-23/2

3/16 x-3x=1/4-23/2

3-48/16 x=1-46/4

-45/16 x=-45/4

x=45*16/4*45=4

Answer 2

1. 5(x-4) = x+8

5x - 20 = x + 8

4x = 28

x = 7

2. 9-7(x+3)= 5-6x

9 - 7x - 21 = 5 - 6x

-7x - 12 = -6x - 4

-x = 8

x = -8

3. (7x+9) - (11x-7)=8

7x + 9 - 11x + 7 = 8

-4x + 16 = 8

-4x = -8

x = 2

4. 3,6+5y=7(1,2-y)

3.6 + 5y = 8.4 - 7y

12y = 4.8

y = 0.4

5. 0,4 (6-4t)=1,9-0,5(3t-7)

2.4 - 1.6t = 1.9 - 1.5t + 3.5

-1.6t + 1.5t = 1.9 - 2.4 + 3.5

-0.1t = 2

t = -20

6. 3/4 * (1/4 x - 1/3)= 3x - 11 целых 1/2

(3/4) * ((1/4) x - (1/3)) = 3x - (11 + 1/2)

(3/16) x - (9/12) = 3x - (23/2)

(3/16) x - (3/4) = 3x - (23/2)

(3/16) x = 3x + (1/4)

-(45/16) x = -(9/4)

x = 4/5