Question

Rozwiąż równania :

a. 3(x-2) = 9

b. 2(3x+7) = 4(8x)

c. 4x-3(2-x) = 8

d. 5(x+3)-6(x+1) = 10

e. -3(4x+2)+5x = x-(9+4x)

Answer 1

a. 3(x-2) = 9
3x-6=9

3x=9+6

3x=15

x=5

b. 2(3x+7) = 4(8x)

6x+14=32x

32x-6x=14

26x=14

x=14/26 

c. 4x-3(2-x) = 8

4x-6+3x=8

7x=8+6

7x=14

x=2

d. 5(x+3)-6(x+1) = 10

5x+15-6x-6=10

-x+9=10

-x=1

x=-1

e. -3(4x+2)+5x = x-(9+4x)

 -12x-6+5x=x-9-4x

-7x-6=-3x-9

-7x+3x=-9+6

-4x=-3

x=3/4