Hello, mathnoobie25!

Using the substitution method, solve:

idk if i got it right but i got y=2.5 and x=1/4 it seems wrong though.

. . Don't you know how tocheckyour answers?

Solve one of the equations for one of its variables.

. . (Try to choose the easiest one.)*

Solve equation(2)for(3)

Substitute into(1): .

Solve for

Substitute into(3): .

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Check

Substitute your answers into the original equations

. . and see if you gettruestatements.

Substitute into(1).

. . . . . Is this true?

We have: . . . .Yes!

Substitute into(2).

. . . . . Is this true?

We have: . . . .Yes!

Therefore, our answers are correct.

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*

We could, say, solve(1)for

. . But why introducefractionswhen we can avoid them?