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

@ash2326 @hartnn

Answer 2

\[4x-y=8\]
you need to find y in terms of x,
Subtract both sides by 4x

Answer 3

y=8?

Answer 4

\[4x-y=8\]
Subtract 4x from both the sides
\[4x-y-4x=8-4x\]
\[-y=8-4x\]
Now multiply the whole equation by -1

Answer 5

y = -8 - (-4x)

Answer 6

\[y=4x-8\]
Correct, so you'll substitute this expression in second to solve