Question

How to solve
3x+y=9
5x+4y=22

Answer 1

(2, 3) x=2, y=3

Explanation:

There are two ways to solve this: substitution & elimination:

Using substitution for this equation:

`\left \{ {{3x+y=9} \atop {5x+4y=22}} \right.`

3x + y =9

y = 9-3x

Substitute for y:

5x + 4(9 - 3x) = 22

5x + 36 - 12x = 22

-7x = -14

x = 2

Solve for y:

3(2) + y = 9

6 + y = 9

y = 3