Question

What’s 4, 6, and 8? (100 points)

Answer 1

Explanation:

Questions do not ask for solutions but how to solve them. The question to choose is one that allows for isolating one of the variables, either x or y, on one side of the equation. Then it can be substituted into the second equation to solve for the solutions.

So for 4, it is 2x+y=10 which becomes y=10-2x

For 6, it is x+y=8 which becomes y=8-x

For 8, it is x-2y=-6 which become x=-6+2y

Answer 2

Explanation:

4. use 3x-y=0; add y left n right, y=3x; substitute to solve

6. use x+y=8; subtract y left n right, x=8-8; substitute to solve

8. use x-2y=-6; add 2y left n right, x=-6+2y; subtitute to solve