Question

Which steps could be taken first to solve the system shown?2x + 3y = 85x – y = 3
Answer

Multiply the second equation by 3.

Multiply the second equation by -3.

Multiply the first equation by -3.

Multiply the first equation by 3.

Answer 1

2x + 3y = 8
5x – y = 3
One method to solve a system of equations is to eliminate one variable by adding the equations.
Look at the y-term in the first equation. It is 3y.
Now look at the y-term in the second equation. It is -y.
What do you need to do to the y-term of the second equation, so that when you add it to the y-term of the first equation, they add up to zero?

Answer 2

so multiply the first equation by 3

Answer 3

,,the first ... " - why ?

Answer 4

The first equation has 3y. The second equation has -y.
What do you add to 3y to get zero?