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3x>7+2
3x>9 /:3
x>3
b)4-5x<-6
-5x<-6-4
-5x<-10 /:(-5)
x>2
c)-7x-2≤-3x+10
-7x+3x≤10+2
-4x≤12 /:(-4)
x≥-3
d)3(2x +1)-4x≤77(x+4)
6x+3-4x≤77x+308
6x-4x-77x≤308-3
-75x≤305 /:(-75)
x≥-230
e)x-1+2(x-2)+3(x-3)>0
x-1+2x-4+3x-9>0
2x+3x+x>9+4+1
6x>14 /:(6x)
x>2⅓
3x>7+2
3x>9 |:3
x>3
b)4-5x<-6
-5x<-6-4
-5x<-10 |:(-5)
x>2
c)-7x-2≤-3x+10
-7x+3x <10+2
-4x< 12|:(-4)
x>3
d)3(2x +1)-4x≤77(x+4) domyślam się, że 7 :)
6x+3 -4x <7x+ 28
-x =< 25 | x (-1)
x>25
e)x-1+2(x-2)+3(x-3)>0
x-1+2x-4+3x-9>0
6x>14 |:6)
x>2 i jedna trzecia (1/3)