2. A system of equations is given below.
2x + 7y = 1
-3x – 4y = 5
a. Create an equivalent system of equations by replacing the first equation by multiplying the first equation by an integer other than 1, and adding it to the second equation.
b. Use any method to solve the equivalent system of equations (the new first equation with the original second equation).
c. Prove that the solution for the equivalent system is the same as the solution for the original system of equations.

Question

2. A system of equations is given below.
2x + 7y = 1
-3x – 4y = 5
a. Create an equivalent system of equations by replacing the first equation by multiplying the first equation by an integer other than 1, and adding it to the second equation.
b. Use any method to solve the equivalent system of equations (the new first equation with the original second equation). 
c. Prove that the solution for the equivalent system is the same as the solution for the original system of equations.

anonymous · Answer

Hello, I need help on this. @Mertsj

mertsj · Answer

Why did you repost this?

anonymous · Answer

Excuse me @Mertsj this is my first time coming on here to figure out how to work this out

mertsj · Answer

1.  Write the first equation on a piece of paper and multiply it by 2.
2.  Post your answer

anonymous · Answer

Okay.. how am I supposed to multiply it by 2?

anonymous · Answer

Do I plug in the 2 for x and y?

mertsj · Answer

What is 2 times 2x?

anonymous · Answer

4

mertsj · Answer

|dw:1390017860510:dw|