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1-2x > 4
-2x > 4-1
-2x > 3 |:(-2)
x < -2/3
b)
1+2x < 4x+5
2x-4x < 5-1
-2x < 4 |:(-2)
x > -2
c)
6-x > 2x
-x-2x > -6
-3x > -6 |:(-3)
x < 2
d)
2(x+1) < 4x
2x+2 < 4x
2x-4x < -2
-2x < -2 |:(-2)
x > 1
e)
2(x-3) ≤ 4
2x-6 ≤ 4
2x ≤ 4+6
2x ≤ 10 |:2
x ≤ 5
1-2x>4
-2x>-1+4
-2x>3/(-2)
x<-1,5
b)
1+2x<4x+5
2x-4x<-1+5
-2x<4/(-2)
x>-2
c)
6-x > 2x
-x-2x > -6
-3x > -6 |:(-3)
x < 2
d)
2(x+1) < 4x
2x+2 < 4x
2x-4x < -2
-2x < -2 |:(-2)
x > 1
e)
2(x-3) ≤ 4
2x-6 ≤ 4
2x ≤ 4+6
2x ≤ 10 |:2
x ≤ 5