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-x < 7 / : -1
x > -7
2)
-3x >9 /: -3
x < -3
3)
-½x < 4 / : - ½
x> -2
4)
4x-7<2x+3
4x-2x<3+7
2x<10/:2
x<5
5)
-x +4>-3(x-10)
-x +4 >-3x+30
-x +3x>30-4
2x>26/:2
x>13