October 2018 1 25 Report

Wytlumaczy mi to ktos ? skad sie to bierze i wgl od razu z rozwiazaniami dalam kompletnie tego nie ogarniam ... ;/ dam naj ! :*

a) 7x-6=-6x+7
7x+6x=7+6
13x=13
x=1

b)1/3x+2=x
1/3x-x=-2
-2/3x=-2
-2x=-6
x=3

c)-7(2x+1)=4
-14x-7=4
-14x=11
x=-11/14

d)8=6(x-1)-4x
8=6x-6-4x
8+6=2x
14=2x
x=7


e)2(1-x)=6(2x-2)
2-2x=12x-12
-2x-12x=-12-2
-14x=-14
x=1

f)3-x/2 + x+2/2 = 1/2
3-x+x+2=1
3+2=1
5≠1
sprzeczne


g) 1/4x - x-1/4 = 1/4
x-(x-1)=1
x-x+1=1
1=1
oznaczone


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