What is the value of the x variable in the solution to the following system of equations? 4x + 2y = 12 x − y = 3 A. 0 B. -3 C. 3 D. 2

Question

asked Dec 2, 2019 223k views

1 Answer

ThePatelGuy · Answer 1 · 2019-12-08T11:55:04+0000

ANSWER

The correct answer is C
x=3 .

Step-by-step explanation

We have

4x+2y=12---(1)

and

x-y=3---(2) .

We solve the two equation simultaneously by elimination method. We need to be smart and eliminate y, since we are looking for
.

We first multiply equation (2) by 2

2x-2y=6---(3) .

We add equation (3) and (1).

$\Rightarrow 6x=18$ .

Dividing through by 6 gives

x=3 .