Answer:
The approximate solution is: x = -2.29; y = 0.46
Explanation:
8x - 10y = -23
9x + 10y =-16
Since you have -10y in one equation and 10y in the other equation, add the equations to eliminate y and solve for x.
17x = -39
x = -39/17
Now substitute -39/17 for x in the first equation, and solve for y.
8(-39/17) - 10y = -23
-312/17 - 10y = -391/17
-10y = -79/17
y = 79/170
The exact solution is x = -39/17; y = 79/170
The approximate solution is: x = -2.29; y = 0.46