Work and answer in picture.
Hint: angle y is adjacent to an angle of 90 degrees adjacent angles add up to 180 degrees
Multiply both sides by 10.
3y + 12 = 4x
subtract 12 and 4x from both sides.
-4x + 3y = -12
The answer is A..........
Since q+d=19, we can re-write this as d=19-q. Using the second equation 0.25q+0.1d=4 we can multiply both sides by 100. So we get 25q+10d=400. So now we can plug d=19-q into 25q+10d=400. So now we get, 25q+190-10q=400. Subtracting both sides by 190, we get 15q=210 and that q=14 plugging that in d=5
