Question

oblicz:

a) 1/4x + 1/2x =8

b) 6x-7=12x+10

c) -12x-6=4x+1

daje naj!;p z góy dzieki ;)

Answer 1

a)

1/4x + 1/2x =8

1/4x + 2/4x = 8

3/4x = 8 

x = 8 : 3/4

x = 8 * 4/3

x = 32/3

x = 10 i 2/3

 

b)

6x-7=12x+10

6x - 12x = 10 + 7

-6x = 17

x = 17 : (-6)

x = -17/6

x = -2 i 5/6

 

c)

-12x-6=4x+1

-12x - 4x = 1 + 6

-16x = 7

x = -7/16

Answer 2

a)1/4x+1/2x=8

1/4x+2/4x=8

3/4x=8 |* :3/4 czyli *4/3

x=8*4/3

x=32/3

x=10 i 2/3

 

b)

6x-7=12x+10 |+7

6x=12x+17 |-12x

-6x=17 |:(-6)

x=-17/6

x=-2 i 5/6

 

c)-12x-6=4x+1|+6

-12x=4x+7|-4x

-16x=7 |(-16)

x=-7/16