9514 1404 393
Answer:
(x, y) = (10, 15)
Step-by-step explanation:
The second equation gives an expression for y that can be substituted into the first equation.
5x -4(2x -5) = -10
-3x +20 = -10 . . . . . simplify
30 = 3x . . . . . . . . . . add 3x+10
10 = x . . . . . . . divide by 3
y = 2(10) -5 = 15
The solution is (x, y) = (10, 15).
