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1+2x<4x+5
2x-4x<5-1
-2x<4 /: (-2)
x>-2
b) 1-2x>4
-2x>4-1
-2x>3 / : (-2)
x<-3/2 (ułamek)
c) 6-x>2x
-x-2x>6
-3x>6/ : (-3)
x< -2
2x-4x<5-1
-2x<4 /:(-2)
x>-2
b)1-2x>4
-2x>4-1
-2x>3 /:(-2)
x<-1,5
c)6-x>2x
-x-2x>-6
-3x>-6 /:(-3)
x<2
2x-4x<5-1
-2x<4/:-2
x>-2
b) 1-2x>4
-2x>4-1
-2x>3/:-2
x>-1½
c) 6-x>2x
-x-2x>-6
-3x>-6/:-3
x<2