Rozwiąż równania , proszę o wszystkie obliczenia :
NP.:
x+12=4
x=4-12
x=-8
ROZWIĄŻ RÓWNANIA :
3x+7=2x+1
x=8-3x
2x-4=4x-2
10x-20=4x-20
6x+2x-10=3x+5
5(x-7)+2=-28
2(x-1)+3(x+1)=26
4(3-x)+9=7(2+x)+29
2(x-3)+3(x-4)+4(x-5)=9
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a)
3x+7=2x+1
3x-2x=1-7
x=-6
b)
x=8-3x
x+3x=8
4x=8 /:4
x=2
c)
2x-4=4x-2
2x-4x=-2+4
-2x=2 /:(-2)
x=-1
d)
10x-20=4x-20
10x-4x=-20+20
6x=0 /:6
x=0
e)
6x+2x-10=3x+5
6x+2x-3x=5+10
5x=15 /:5
x=3
f)
5(x-7)+2=-28
5x-35+2=-28
5x=-28+35-2
5x=5 /:5
x=1
g)
2(x-1)+3(x+1)=26
2x-2+3x+3=26
5x=26+2-3
5x=25 /:5
x=5
h)
4(3-x)+9=7(2+x)+29
12-4x+9=14+7x+29
-4x-7x=14+29-12-9
-11x=22 /:(-11)
x=-2
i)
2(x-3)+3(x-4)+4(x-5)=9
2x-6+3x-12+4x-20=9
2x+3x+4x=9+6+12+20
9x=37 /:9
x=4,1
Licze na naj :D
a) 5x=1-7
5x=-6 /5
1x=-1,2
b) 1x=8-3x
1x+3x=8
4x=8/4
x=2
c)2x-4=4x-2
2x-4x=-2+4
-2x=6/-2
x=-3
d)10x-20=4x-20
10x-4x=20-20
6x=0
e)6x+2x-10=3x+5
6x+2x-3x=5+10
5x=15/5
x=3
f)5(x-7)+2=-28
5x-35+2=-28
5x=35-2-25
5x=8/5
x=1,6
g)2(x-1)+3(x+1)=26
2x-2+3x+3=26
2x+3x=2-3+26
5x=25/5
x=5
h)4(3-x)+9=7(2+x)+29
12-4x+9=14+7x+29
-4x-7x=-12-9+14+29
-11x=21/(-11)
x=-9,1
i)2(x-3)+3(x-4)+4(x-5)=9
2x-6+3x-12+4x-20=9
2x+3x+4x=6+12+20+9
9x=47/9
x=5,2