Question

Malik used these steps to solve the system of equations.*In the Picture.*

Equation- 2x+4y=20, 5x-3y=11

What needs to be done in step 2?
A) Divide both sides of the equations in step 1 by the same number to eliminate one variable.
B) Multiply both sides of the equations in step 1 by the same number to eliminate one variable.
C) Add the equations in step 1 to eliminate one variable
D) Subtract the equations in step 1 to eliminate one variable.

Answer 1

The correct answer is C. Add the equations in step 1 to eliminate one variable

By adding the equations in step 1, you eliminate the y variable so that you are able to solve for x.

Answer 2

C)Add the equations in step 1 to eliminate one variable

Explanation:

Given is a system of equations as

`2x+4y=20\\5x-3y=11`

Step I is to multiply I equation by 3 and ii equation by 4

Step 2 will be to add both equations arrived in step I so that y will be eliminated.

We get 26x=104

x=4

and y =9

Thus correct answer is C)