oblicz: 1) -1,2 x = - 1/2 2) 5 5/8 x = 18 3) 7/9 x = 16 1/3 4) 0,2 * ( 10 - 5x ) = 3 + 2 * ( x - 1 ) Dam naj ;) Proszę o jak najszybszą odp. !
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1] -1,2x= -1/2
-12/10x= -1/2 /:[-12/10]
x=5/12
2] 5 5/8x=18
45/8x=18 /:45/8
x=3 1/5
3] 7/9x=16 1/3
7/9x=49/3 ;/7/9
x=21
4] 0,2[10-5x]=3+2[x-1]
2-x=3+2x-2
-x-2x=3-2-2
-3x= -1 /:[-3]
x=1/3
1)-1,2x=-/1,2
x=-1/2*10/2
x=-5/12
2)5 5/8x=18
x=18* 8/45
x=405/4
3)7/9x=16 1/3
x=144/7
4)0,2 *(10-5x)=3+2*(x-1)
2-1x=3 +2x-2
-3x=-1
x=1/3
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