3x-4 < 7x+8
7x-3x < -8-4
4x < -12
x < -12 per 4
x < -3
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3x-4 < 7x+8
7x-3x < -8-4
4x < -12
x < -12 per 4
x < -3
3x-4=7x+8
3x-4+4=7x+8+4
3x=7x+12
3x-7x=7x-7x+12
-4x=12
x=12/-4
x=-3
x<-3
hp {-2,-1,0...}