Question

Solve
3x-9y=3
6x-3y=-24
using substitution.

Answer 1

3x - 9y = 3
6x - 3y = 24

We need to find x or y first.

start with substituting with x.
3x = 9y + 3
x = 3y + 1

substitute
6(3y+1) - 3y = 24
solve for y now

Answer 2

I got \[y = \frac{ 6 }{ 5 }\]

Answer 3

18y + 6 - 3y = 24
15y = 18
y = 6/5
yep correct

Answer 4

3x - 9y = 3
substitute back in to solve for x.

3x - 9 (6/5) = 3

Answer 5

\[y=\frac{ 23 }{ 5 }?\]

Answer 6

Oops, i meant x.

Answer 7

3x - 54/5 = 3
3x = 3 + 54/5
3x = 69/5
x = 23/5
yep good work!

Answer 8

Thanks, I have like 2 more.

Answer 9

yeah, just post it seperately