Question

System of Equations: Solve for (x,y) given the system of linear equations "X 1 point

- y = 4" and "x + y = 4".

Answer 1

(x, y) = (4, 0)

Explanation:

It looks like you want to solve ...

• x - y = 4
• x + y = 4

Adding the two equations gives ...

2x = 8

x = 4 . . . . divide by 2

Then ...

y = 4 - x = 0

The solution is (x, y) = (4, 0).

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If you think about what you're seeing when you read the equations, you realize that adding or subtracting y gives the same result. Hence y=0 and x=4.