Given that x + 3 is less than or equal to 0, simplify | 3-4x | + | 3x + 4|

Given that x + 3 is less than or equal to 0, simplify | 3-4x | + | 3x + 4|

x+3≤0
x≤-3
|3-4x|+|3x+4|
=3-4x-3x-4
=-7x-1