Question

Rozwiąż równania. a) 8= 4(x+1)= b) jedna druga x= jedna czwarta x-4= c) 1-2x/4= 4x

Answer 1

a) 8 = 4(x+1)
8 = 4x + 4
- 4x = 4 - 8
- 4x = -4 / : (-4)
x = 1

b) jedna druga x= jedna czwarta x-4=

1/2x = 1/4x - 4
1/2x - 1/4x = - 4
2/4x - 1/4x = - 4
1/4x = - 4 / : (1/4)
x =

c) 1-2x/4 = 4x
1 - 2x : 4 = 4x
-8x = 4x - 1
-8x - 4x = - 1
-12x = - 1 / : (-12)
x = 1/12

 

Answer 2

a)8=4(x+1)

8=4x+4

4x=4-8

4x=(-4)|:4

x=(-1)

 

b)1/2x=1/4x-4 |*4

4*1/2x=4*1/4x-4*4

2x-1x=-16

1x=(-15)|:1

x=(-15)

 

c)1-2x/4=4x |*4

1*4-4*2x/4=4*4x

4-2x=16x

-2x-16x=-4

-18x=(-4)|:4

x=4,5