Solve the equation $|x-7|-3|2x+1|=0$ This equation is very unfamiliar with me, I never seen things like that because I always solved equations of the form $|\text{something}|=\text{things}$ but never seen equations that look like $|\text{something}|=|\text{things}|$. So if I learn how to solve it I will be able to solve questions that looks like it. Thank you;

|x-7|=|6x+3|
then either 
x-7=6x+3
or 
x-7=-6x-3
solve these two equations.
