Question

Which of these strategies would eliminate a variable in the system of equations?

{
5
x
+
3
y
=
9
4
x
−
3
y
=
9

⎩
⎪
⎪
⎨
⎪
⎪
⎧
​

5x+3y=9
4x−3y=9
​

Answer 1

Answer:Add the equations. 3y and -3y will cancel.

Explanation:

Then you are left with 9x =18. Solve for x by dividing both sides by 9 to get x=2. Substitute 2 in place of x in either of the original equations to solve for y.