Mathematics
OpenStudy (anonymous):

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

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

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):

OpenStudy (anonymous):

$9(19-8y) + 7y = -24$

OpenStudy (anonymous):

$171-65y=-24$ $-65y=-24-171=-195$ $y=\frac{-195}{-65}=3$

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