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.

Answer 1

Do you know this by any chance?

Answer 2

do u know this?

Answer 3

Do u know this @douglaswinslowcooper @Mertsj

Answer 4

Why don't you just do what the directions say?

Answer 5

multiply the first equation term by term by 2

multiply the second one by 4/3 and then add the two together

the result will be an equation in y only solve it.
Go back and solve for x.

Substitute these x, y values into the original two equations to show they solve them also.

Answer 6

because i dont understand it

Answer 7

Write down the first equation.
Multiply it by 2
Post your result.

Answer 8

The directions say:
multiplying the first equation by an integer other than 1

Answer 9

I still dont understand @Mertsj

Answer 10

Were you able to write the first equation down on a piece of paper?