Write an equation to find x.

6x + 16 = 2x + 12; x = 2
6x + 16 = 2x + 12; x = 1
6x + 16 + 2x + 12 = 180; x = 19
6x + 16 + 2x + 12 = 180; x = 26

Question

Write an equation to find x.  

    6x + 16 = 2x + 12; x = 2
    6x + 16 = 2x + 12; x = 1
    6x + 16 + 2x + 12 = 180; x = 19
    6x + 16 + 2x + 12 = 180; x = 26

msmr · Answer

Which part do you not understand? It seems to me like you just substitute the value of x into the equation; for example, in the first one, if x=2 then you would  write:

(6*2) + 16 = (2*2) + 12

msmr · Answer

But I'm not sure if that's what you were asking.