Solution:
Note that:
Use system of equations to solve for x and y.
3x + 5y = 20
3x + 5y = 20
- 0y - 5y = 30 - 20
- => -5y = 10
- => y = -2
Substitute the value of y into any equation to find x.
- 3x + 5y = 20
- => 3x + 5(-2) = 20
- => 3x - 10 = 20
- => 3x = 30
- => x = 10
Put the solution in (x,y) form.
Hoped this helped!