Question

For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

4x − y = 8
2x + 3y = 9

Answer 1

From First equation : \[y = 4x - 8\]

Put it in second equation, we have

\[2x + 3(4x - 8) = 9\]
\[2x + 12x - 24 = 9\]
\[14x = 9+24\]
\[x = 33/14\]

And therefore,

y = 10/7..
Understood or not???