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OpenStudy (anonymous):
solve by substitution method:
9x+7y=-24
x=19-8y
what is the solution of systems

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OpenStudy (anonymous):
substitute 19 - 8y on the variable x of the first equation. so, it will look like this:
9(19-8y) + 7y = -24
then, you can solve for y now.

OpenStudy (anonymous):
\[9(19-8y)+7y=-24\] etc

OpenStudy (anonymous):
what awesome one said. now you have one equation with one unknown

OpenStudy (anonymous):
I couldn't solve it

OpenStudy (anonymous):
ok multiply out using distributive law

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OpenStudy (anonymous):
\[38-72y+7y=-24\]
collect like terms
\[38-65y=-24\]

OpenStudy (anonymous):
subtract 38
\[-65y=-62\]
divide
\[y=\frac{62}{65}\]

OpenStudy (anonymous):
i made a mistake

OpenStudy (anonymous):
\[
9(19-8y) + 7y = -24
\]

OpenStudy (anonymous):
\[171-65y=-24\]
\[-65y=-24-171=-195\]
\[y=\frac{-195}{-65}=3\]

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OpenStudy (anonymous):
now since y = 3 substitute back in equation 2 to get \[x=19-8\times 3=-5\]

OpenStudy (anonymous):
so satellite73 the solution ordered pair is (-5,3) correct

OpenStudy (anonymous):
so satellite73 the solution ordered pair is (-5,3) correct

OpenStudy (anonymous):
yes that is it

OpenStudy (anonymous):
thanks again

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