Question

r+s=12
4r-6s=12
I need to solve the system by substitution and check my answer, please help :(((

Answer 1

1. Solve the first equation for r
2. Replace r in the second equation with the expression you got in Step 1
3. Solve the resulting equation for s
4. Replace s with that number in an equation that has both s and r.
5. Solve for r

Answer 2

can you do it....

Answer 3

like the first one so i can see

Answer 4

1. r=12-s
2. 4(12-s)-6s=12
48-4s-6s=12
-10s=-36
s=3.6

3. r=12-3.6
4. r=8.4

Answer 5

x+y=12
x-y=2
solve by elimination

Answer 6

Ok. I did the first one so you could see. Now it's your turn.

Answer 7

but this one is elimanation

Answer 8

Add the two equations.