Question

8. [6.03] What is the value of the y variable in the solution to the following system of equations?
13x - 6y = 20
7x + 4y = 18 (5 points)

Answer 1

2
1
-2
-1

Answer 2

This system s solvable many ways. However, if you take the bottom equation, multiply by 2, then subtract the first equation from it, you will have a single x. Then you can solve for that x and know what x is in terms of y.

Next, you replace the x in either with that. This will give you the entire equation in y. You can then solve for y and have the answer.