Question

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

2x – 4y = 6
A.
Write the second equation in slope-intercept form.
B.
Subtract 2x from both sides of the second equation.
C.
Write the first equation in standard form.
D.
Multiply the first equation by 3.

Answer 1

I think the answer would be B

Answer 2

Answer: C.

• Explanation:

To use the elimination method you first need that both equations are in standard for, i.e, all the variables must be on the left hand side of the equation and the constant values on the right hand side, in this case

`\left \{ {{y-3/4x=3} \atop {2x-4y=2}} \right.`

then use multiplication by a number and the addition property of the equality to solve the system. For our case we cam multiply the first equation by 4 and the add the two equations to find the variable x.