Question

X+y=5
5x - 3y - 17
answer

Answer 1

9514 1404 393

Answer:

(x, y) = (4, 1)

Explanation:

We assume you want to solve ...

• x +y = 5
• 5x -3y = 17

Multiply the first equation by 3 and add the second:

3(x +y) +(5x -3y) = 3(5) +(17)

8x = 32 . . . . . . simplify

x = 4 . . . . . . . . .divide by 8

4 +y = 5 . . . . . . substitute into the first equation

y = 1 . . . . . . . . .subtract 4

The solution is (x, y) = (4, 1).