exam Maths Puzzle Numerical Ability

-23 <_ 4x -6 <_ -5
The solution is {xl?<_x<_?}
Will someone show me how to do this correctly? PLEASE??

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exam Other Question

Given: AB is equal to BC: D is the midpoint of segment AC PROVE: triangle ABD is equal to triangle CBD I need help with what is the slope of the line passing through the given points

(-3,5)and (3,-2)