-x+4>-3x+3
2x>-1
x>-1/2
2x+6-5>-2x-7
2x+1>-2x-7
4x>-8
x>-2
-2x+2+5x≥7x+12
3x+2≥7x+12
-10≥4x
x≤-2,5
a)
-x+3x>3-4
2x>-1/:(2)
x>-½
b)
2x+2x>-7-6+5
4x>-8/:(4)
c)
-2x+5x-7x≥12-2
-4x≥10/:(-4)
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-x+4>-3x+3
2x>-1
x>-1/2
2x+6-5>-2x-7
2x+1>-2x-7
4x>-8
x>-2
-2x+2+5x≥7x+12
3x+2≥7x+12
-10≥4x
x≤-2,5
a)
-x+4>-3x+3
-x+3x>3-4
2x>-1/:(2)
x>-½
b)
2x+6-5>-2x-7
2x+2x>-7-6+5
4x>-8/:(4)
x>-2
c)
-2x+2+5x≥7x+12
-2x+5x-7x≥12-2
-4x≥10/:(-4)
x≤-2,5