The problem
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On this problem, if you put -4 in for x to test the answer, both sides have the same answer of -21, so how can the left side be < if the answer is the same?
Answer provided by our tutors
The solution for the ineaulity "6x+3<4x-5" is the interval "(-~, -4)".
If you plug in the value for "x = -4" you will get false statement "-21 < -21" since "-4" does not belong to the solution, the interval "(-~, -4)".
The graph solution for the ineaultiy "6x+3<4x-5" bellow:
