Question

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

Answer 1

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.

Answer 2

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

Answer 3

what awesome one said. now you have one equation with one unknown

Answer 4

I couldn't solve it

Answer 5

ok multiply out using distributive law

Answer 6

\[38-72y+7y=-24\]
collect like terms
\[38-65y=-24\]

Answer 7

subtract 38
\[-65y=-62\]
divide
\[y=\frac{62}{65}\]

Answer 8

i made a mistake

Answer 9

\[
9(19-8y) + 7y = -24

\]

Answer 10

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

Answer 11

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

Answer 12

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

Answer 13

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

Answer 14

yes that is it

Answer 15

thanks again