Question

Use substitution to solve.

3x+24y=24
27x-15y=-15

Answer 1

multiply the top equation by -9 to cancel out the x's. Then you can solve for y. Once you have that, plug the y back in to find the x.

Answer 2

this is not substitution @kjmoney

Answer 3

solve for x in the first equation(you could solve for any variable in either equation but this one looks like the best choice)

3x+24y = 24
3x = 24-24y
x = 8 - 8y

now put this into equation2 for x

27x-15y = -15
so
27(8-8y) - 15y = -15

can you solve for y here @blkbutterfly13 ?

Answer 4

@zzr0ck3r thanks, that's how I started off but it didn't look right. I just needed a second opinion.

Answer 5

you got it now?

solve for y, then plug that value into either equation and solve for x

Answer 6

yes I did, thank you so much!!

Answer 7

np