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c)
0.6-3/4x=-1/3
-¾x=-⅓-0,6
-¾x=-14/15
x=1¹¹/₄₅
d)
3x-4=5x+2
3x-5x=2+4
-2x=6
x=-3
g)
1/10(25x-40)+2=3/4(8x+12)-9
2,5x-4+2=6x+9-9
2,5x-6x=9-9+4-2
-3,5x=2
x=-⁴/₇
e)
7-2x=7x-2
-2x-7x=-2-7
-9x=-9
x=1
zad12
c)
25>x+10
-x>10-25
-x>-15
x<15
d)
-2x-4>-5x+5
-2x+5x>5+4
3x>9
x>3
e)
4 (1/2x-3/4)<0
2x-3<0
2x<3
x<1,5
-0,75x=-0,09|÷0,75
x=0,12
d) 3x-4=5x+2|+4
3x=5x+6|-5x
-2x=6|÷(-2)
x=-3
g)1/10(25x-40)+2=3/4(8x+12)-9
1/10×25x-1/10×40+2=3/4×8x+3/4×12-9
2,5x-4+2=6x+9-9
2,5x-2=6x|×2,5x
-2=15x
15x=-2|÷15
x=-0,1
e)7-2x=7x-2|-7
-2x=7x-9
7x-9=-2x|-7x
-9=-9x
-9x=-9|÷-9
x=1
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