Question

This looks pretty easy... I just am not sure how to figure it out....What is the value of the x variable in the solution to the following system of equations? 4x + 2y =12 x − y = 3 −1 5 −2 2

Answer 1

Express x from the secondequation:  x=3+y. 
Then substitude it in first equation:

4(3+y)+2y=12,
4·3+4y+2y=12,
12+6y=12,
6y=12-12,
6y=0,
y=0 and x=3+0=3
Answer: (3,0)