Question

2x+6y=24 and 5x-2y=9 soving by subsitution

Answer 1

there are numerous ways to start, so lets just begin somewhere! lol

first let us take the first equation and x the subject.
2x+6y=24
2x =24-6y... so what would be the next line?
x =

Answer 2

x=24-6y/2

Answer 3

yes lets simplify to y=12-3y... .happy with this?

Answer 4

now lets substitute x=12-3y in to the second equation 5x-2y=9. basically we are replacing the x variable with 12-3y
5(12-3y)-2y=9

Answer 5

5(12-3y)-2y=9 lets expand
60-15y-2y=9 .. can u solve for y now and tell me what value u get?

Answer 6

17 y=51

Can you find y now?

Answer 7

\[
\frac {51}{17}=3

\]