Rozwiąż równania (rozpisz) :
a) 2x-0,5(x-2)=4,5
b) 5x-2=2-7x+x
c) 2(x-2)+8=3(2x-1)
d) -4(x+2)=0
e) 1/2x+8=3x-10
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a)2x-0,5(x-2)=4,5
2x-0,5x+1=4,5
2x-0,5x=4,5-1
1,5x=3,5 /:1,5
x=3,5:1,5
x=35/10:15/10
x=35/10*10/15
x=7/3
x=2 1/3
b)5x-2=2-7x+x
5x+7x-x=2+2
13x=4 /:13
x=4/13
c)2(x-2)+8=3(2x-1)
2x-4+8=6x-3
2x-6x=-3-8+4
-4x=-7 /:(-4)
x=7/4
x=1 3/4
d)-4(x+2)=0
-4x-8=0
-4x=8 /:-4
x=-8/4
x=-2
e)1/2x+8=3x-10
1/2x-3x=-10-8
1/2x-6/2x=-18
-5/2x=-18 /:(-5/2)
x=-18:(-5/2)
x=18/1*2/5
x=36/5
x=7 1/5