rozwiąż nierówności .
a) 3(2x+4) + 5 ( 1-3x) > - 8 ( 2x - 5) + 12
b) x/5 - 2(x+1)/15 > 1/5 ( 1+ x )
c) 3(7-x)/2 - 2 < - 3x
d.) 2+x/3 - 3-x/6 > - 1
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a) 6x+8+5-15x>-16x+40+12
-11x+13>-16x+52
5x>39 /;5
x>7 4/5
a) 3(2x+4) + 5 ( 1-3x) > - 8 ( 2x - 5) + 12
6x + 12 + 5 – 15x > - 16x + 40 + 12
6x – 15x + 16x > 40 + 12 -12 – 5
7x > 35 /: 7
x > 5
b) x/5 - 2(x+1)/15 > 1/5 ( 1+ x ) /* 15
3x – 2(x + 1 ) > 3 ( 1 + x)
3x – 2x – 2 > 3 + 3x
3x – 2x – 3x > 3 + 2
- 2x > 5 / : (-2)
x < - 5/2
x < - 2 i 1/2
c) 3(7-x)/2 - 2 < - 3x /* 2
3( 7 – x ) – 4 < - 6x
21 – 3x – 4 < - 6x
-3x + 6x < 4 -21
3x < - 17 / : 3
x < -17/3
x < - 5 i 2/3
d.) 2+x/3 - 3-x/6 > - 1 / * 6
2(2+x) - (3-x) > -6
4 + 2x - 3 + x > -6
3x > -6 +3 - 4
3x > -7 /: 3
x > - 7/3
x > - 2 i 1/3