Posted by lindsay on .
solve the following absolute value question
/4x + 5/ =25
assume 4x+5 is positive, then 4x>-5 or x>-1.2 AND
4x+5=25 or 4x=20 or x=5, which meets both of the requirement above.
assume 4x+5 is negative, then 4x<5, or x<1.25, AND 4x+5=-25 or 4x=-30, and x=-7.5 which meets the requirement
x= -7.5 or x=5