elimination algebra problem?

If you MUST use elimination then

s+3y=4

s=1

multiply equ 2 by -1 then add to the other:

s+3y=4

s=1 ----> -s =-1

----------------------

3y = 3 so y = 1

and you already know s

However, it would be easier to just use substitution instead:

(1) + 3y = 4

3y = 3

y = 1

S was already solved for, so it can be substituted in. There was no need to eliminate it really.

3y = 3

y = 1

They gave you what "s" is so, substitute all occurrences of "s" with 1. like so.

s + 3y = 4

1 + 3y = 4

ok now try to solve for y by leaving y on one side of the equation and everything else on the other side. It doesn't matter which side but, in this case since "y" is aleady on the left and the problem is simple w will leave it on the left. Like so.

1 + 3y = 4

subtract 1 from both sides of the equation.

1 -1 +3y = 4 -1

0 + 3y = 3

3y = 3

now divide by 3 on both sides

3y = 3

3y/3 = 3/3

y = 1

There you have it. y=1 but, to make sure verify the answer by substituting all know variables with their respective values

give that s=1 and y=1

s + 3y = 4

1 +3(1) = 4

1 + 3 = 4

4 = 4 yes, success!!!

If your trying to find Y, it's also 1.

s+3y=4 replace s with 1

1+3y=4 subtract 1 from 4

3y=3 devide 3 by 3

y=1 answer

I don't know if you want the answer because that's not what the question says, but that's my guess. To figure this out, you must replace s as 1 as shown.

S+3y=4 to 1+3y=4

Next, you take 1 away on each side.

1+3y-1=4-1 and get 3y=3.

Then, you divide by 3 on each side.

3y/3=3/3 and get y=1.

The answer to y is 1.

If I'm understanding the question correctly, I'm assuming its asking you to solve for y.

In this case, all you would need to do is plug the 1 in for s in the first equation:

s + 3y=4 becomes 1 + 3y = 4

then you would just need to solve the equation for y:

subtract 1 from both sides

3y = 3

divide both sides by 3

y = 1

The answer is 1 you do it like this 1st substititite s for 1 so it looks like this now 1+3y=4 2nd subtract 1 from both sides of the equal sign. It now looks like 3y=3 3rd divide both sides by 3 it now looks like y=1

1+3y=4 ~ plug in the 1 for s

3y=4-1~subtract the 1

y=3/3~ get the y by itself, so divide by 3

y=1

Answer(1,1)

s+3y=4

s=1

Really simple !!!

input the known value of s in

s + 3y = 4

1 + 3y = 4

y = 1 .................................

Seriously its harder To post here a question than solve this