What is the first step in solving this system of equations by elimination?

2x – 2y = 5
5x + 2y = 9

Question

What is the first step in solving this system of equations by elimination?

2x – 2y = 5
5x + 2y = 9

anonymous · Answer

eliminating the y's

anonymous · Answer

Is this multiple choice or written response?

anonymous · Answer

Multiple choice

anonymous · Answer

A.
Subtract the two equations.
B.
Add the two equations.
C.
Solve for y.
D.
Multiply each equation by 2.

anonymous · Answer

D

anonymous · Answer

dude I will follow you and give you a medal if you help me

anonymous · Answer

Ok thanks! Can you help me on 2 more?

anonymous · Answer

yes

anonymous · Answer

Thanks!
Which of the following would be the best first step to solve the system of equations?
     
2x – 9y = 6
4x – 3y = –7

anonymous · Answer

A.
Multiply the first equation by 4.
B.
Multiply the second equation by 2.
C.
Multiply the first equation by –3.     
D.
Multiply the second equation by –3.

anonymous · Answer

multiply the second equation by -3

anonymous · Answer

you want to get x or y the same number but opposite signs first so those can be eliminated

anonymous · Answer

OK one more one minute I have to type the equation

anonymous · Answer

k

anonymous · Answer

How many solutions will the following system of linear equations have?
-2x+4y=-7
$$y=-\frac{ 1 }{ 2 }x+$$

anonymous · Answer

it was +5

anonymous · Answer

A.
0
B.
1
C.
2
D.
infinite

anonymous · Answer

Nvm I submitted it and got a 90.  Thanks dude! you are the best

anonymous · Answer

sorry was gonna get someone to help you >.< my guess was 2 but wasnt completly sure