Which systems of equations have enough variables and equations to potentially solve the system? Select all that apply.

1) {3x−4=y
−5x+7=y

2) {3x−4y=8z
−3x+6y=4z

3) {2x−4y=8
−2x+6y=14

4) {y=2x−4
y=−9z+6

5) {y=2x−4
y=−x+6

please get me to 10points and thank you! :)

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150