a)6(x+2)=24
b)2(x+3)=14-2x
c)5(2x+3)=2(x-3)+x
d)-3(x-2)-2=x-5-4x
e)8x-5=2(2+x)
a)
6(x+2)=24
6x+12=24
6x=24-12
6x=12 /:6
x=2
b)
2(x+3)=14-2x
2x+6=14-2x
2x+2x=14-6
4x=8 /:4
c)
5(2x+3)=2(x-3)+x
10x+15=2x-6+x
10x-2x-x=-6-15
7x=-21 /:7
x=-3
d)
-3(x-2)-2=x-5-4x
-3x+6-2=x-5-4x
-3x-x+4x=-5-6+2
-4x+4x=-9
0=-9 sprzeczne
e)
8x-5=2(2+x)
8x-5=4+2x
8x-2x=4+5
6x=9 /:6
x=9/6
x=1i1/2
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a)
6(x+2)=24
6x+12=24
6x=24-12
6x=12 /:6
x=2
b)
2(x+3)=14-2x
2x+6=14-2x
2x+2x=14-6
4x=8 /:4
x=2
c)
5(2x+3)=2(x-3)+x
10x+15=2x-6+x
10x-2x-x=-6-15
7x=-21 /:7
x=-3
d)
-3(x-2)-2=x-5-4x
-3x+6-2=x-5-4x
-3x-x+4x=-5-6+2
-4x+4x=-9
0=-9 sprzeczne
e)
8x-5=2(2+x)
8x-5=4+2x
8x-2x=4+5
6x=9 /:6
x=9/6
x=1i1/2