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a) 20-5x = 4-13x p=-2
-5x+13x=4-20
8x=-16 /:8
x=-2
p=x
b)6x-9=x-(6-2x) p=1
6x-9=x-6+2x
6x-2x-x=9-6
3x=3/:3
x=1
p=x
c)3x-(1+5x)=1/2x+14 p=-5
3x-1-5x=1/2x+14
3x-5x-1/2x = 14+1
-2,5x=15/:(-2,5)
x=-6
zad.2
a) 2x+4=9
2x=9-4
2=5/:2
x=5/2
x= 2 i 1/2
b) -3x+6=7
-3x=7-6
-3x=1/:(-3)
x=-1/3
c) 4x+3=2x-9
4x-2x=-9-3
2x=-12/:2
x=-6
d) x-6=5x-2
-5x-x=-2+6
-4x=4/:(-4)
x=-1
zad.3
a) 4x-1/3 =5 /*3
3*4x-1/3=3*5
4x-1=15
4x=15+1
4x=16/:4
x=4
b) 2-3x/4=1/*4
2-3x=4
-3x=4-2
-3x=2/:(-3)
x=-2/3
c) 6x+1/5 = x /*5
6x+1=5x
6x-5x=-1
x=-1
d) 3-x=2x-3/2 /*2
6-2x=2x-3
-2x-2x=-6-3
-4x=-9
x=9/4
x=2 i 1/4
zad.5
a) 3(2x-7)-(7x-13)=-10
6x-21-7x+13=-10
6x-7x=-10+21-13
-x=-2/:(-1)
x=2
b) -2(-27-3x)=-3(2x-10)
54+6x=-6x+30
6x+6x=30-54
12x=-24/:12
x=-2
d) 3x= x-(1-(x-3))
3x=x-(1-x+3)
3x=x-1+x-3
3x-x-x=-1-3
x=-4
e) 5x-(2x+(3-x))=11
5x-(2x+3-x)=11
5x-2x-3+x=11
5x-2x+x=11+3
4x=14/:4
x=14/4
x=3 i 2/4
x=3 i 1/2
f) 1-(x-(x-(x-1)))=0
1-(x-(x-x+1))=0
1-(x-x+x-1)=0
1-x+x-x+1=0
-x+x-x=0-1-1
-x=-2/:(-1)
x=2
mam nadzieje,ze w polowie pomoglam. Na przyszlosc dawaj mniej zadan na raz.