zad.5.1
a)2(x+3)-3(x+1)=x-13
b)1+2[3(x-1)-5(2x-3)]=2x-7
c)5(x-1)-2(x+3)=3x+2
d)3(2x-3)+2(x-4)=4(x-2)-3(5-x)
e)4(x-2)-5(3x-9)=0
f)2(3-x)+5=3-2(x-4)
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a)
2(x+3)-3(x+1)=x-13
2x+6-3x-3=x-13
-x-x=-13-3
-2x=-16/:(-2)
x=8
b)
1+2[3(x-1)-5(2x-3)]=2x-7
1+2[3x-3-10x+15]=2x-7
1+6x-6-20x+30=2x-7
-14x-2x=-7-25
-14x=-32/:(-14)
x=2 4/14
x=2 2/7
c)
5(x-1)-2(x+3)=3x+2
5x-5-2x-6=3x+2
3x-3x=2+11
o≠23 rów.fałszywe
d)
3(2x-3)+2(x-4)=4(x-2)-3(5-x)
6x-9+2x-8=4x-8-15+3x
8x-17=7x-23
8x-7x=-23+17
x= -6
e)
4(x-2)-5(3x-9)=0
4x-8-15x+45=0
-11x+37=0
-11x=-37/:(-11)
x=3 4/11
f)
2(3-x)+5=3-2(x-4)
6-2x+5=3-2x+8
-2x+11=-2x+11
-2x+2x=11-11
0=0
a)
2(x+3)-3(x+1)=x-13
2x+6-3x-3=x-13
-x-x=-13-3
-2x=-16/:(-2)
x=8
b)
1+2[3(x-1)-5(2x-3)]=2x-7
1+2[3x-3-10x+15]=2x-7
1+6x-6-20x+30=2x-7
-14x-2x=-7-25
-14x=-32/:(-14)
x=2 4/14
x=2 2/7
d)
3(2x-3)+2(x-4)=4(x-2)-3(5-x)
6x-9+2x-8=4x-8-15+3x
8x-17=7x-23
8x-7x=-23+17
x= -6
e)
4(x-2)-5(3x-9)=0
4x-8-15x+45=0
-11x+37=0
-11x=-37/:(-11)
x=3 4/11