152k views
2 votes
Which of the following

1 Answer

7 votes

SOLUTION

We want to find which of the following is a solution to


2x-y=-1

Let's try the first option (2, -1)

So, the first value will be x, so if we get y as 1, then this option is correct

Now replacing x for 2 in the equation, we have


\begin{gathered} 2x-y=-1 \\ 2(2)-y=-1 \\ 4-y=-1 \\ y=4+1 \\ y=5 \end{gathered}

So, this is not correct. Let us try the next option (1, 2)

Let's put x to be 1 and see what y becomes


\begin{gathered} 2x-y=-1 \\ 2(1)-y=-1 \\ 2-y=-1 \\ y=2+1 \\ y=3 \end{gathered}

So, when x = 1, y =3, If you look at the 4th option, we can see (1, 3), which means x = 1 and y = 3, hence

the correct answer is (1, 3) the 4th option

User Predrag
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories