Which is the best first step when solving the following system of equations?

x+y=3

4x-y=7

A Multiply the first equation by 4.

B Add the first equation to the second equation.

C Multiply the second equation by Negative 1.

Question

Mathematics

Paola

1 November, 16:04

Which is the best first step when solving the following system of equations?

x+y=3

4x-y=7

A Multiply the first equation by 4.

B Add the first equation to the second equation.

C Multiply the second equation by Negative 1.

+3

Answers (1)

Know the Answer?

Ellie Kent · Answer 1

option B. add the first equation the second, is the answer

using elimination method,

x + y = 3 ... (1)

4x - y = 7 ... (2)

once you add (1) and (2), the 'y' terms get cancelled, and you get,

5x = 10

x = 10/5

= 2

Which is the best first step when solving the following system of equations?x+y=34x-y=7A Multiply the first equation by 4.B Add the first equation to the second equation.C Multiply the second equation by Negative 1.

Which is the best first step when solving the following system of equations?

x+y=3

4x-y=7

A Multiply the first equation by 4.

B Add the first equation to the second equation.

C Multiply the second equation by Negative 1.