These substitution equation is really frustrating me what is the purpose of these equation I don't see how they are part of every day life.
Anyway any help on this equation is very helpful.
8x – 4y = 16
y = 2x – 4
Stop complaining. You should see the math I do. I purposely choose it so that I can have no meaning in real life. Think of it as abstract expressionism.
8x-4y=16
Anyway any help on this equation is very helpful.
8x – 4y = 16
y = 2x – 4
y=2x-4
Thus,
8x-4(2x-4)=16
8x-8x+16=16
16=16
Which is true.
That means there were infinitely many solutions to that equation.
Thus, if x=t (some number) then the second equation tells us that,
y=2t-4.
Thus,
x=t
y=2t-4.
For any number t.