Hello!
We put y into the second equation
2x -1(3x - 26) = 19
Distribute the -1
2x - 3x + 26 = 19
Combine like terms
-x + 26 = 19
Subtract 26 from both sides
-x = -7
Since x is negative we can multiply both sides by -1 to make it positive
x = 7
Now we put this into the first equation to find y
y = 3(7) - 26
Multiply
y = 21 - 26
Subtract
y = -5
The answer is -5
Hope this helps!