Respuesta :
X would equal to 4
If we substitute the x for 4 and multiply we will get 16=16
which means that x is equal to x
3x+4=4x
4=x
x=4 (you don't have to switch the x to the beginning as long as your teacher doesn't require it)
4=x
x=4 (you don't have to switch the x to the beginning as long as your teacher doesn't require it)