Solve for y:
-9/58 = (-4-y)/(12 y-2)
-9/58 = (-4-y)/(12 y-2) is equivalent to (-4-y)/(12 y-2) = -9/58:
(-4-y)/(12 y-2) = -9/58
Cross multiply:
58 (-4-y) = -9 (12 y-2)
Expand out terms of the left hand side:
-232-58 y = -9 (12 y-2)
Expand out terms of the right hand side:
-232-58 y = 18-108 y
Add 108 y+232 to both sides:
50 y = 250
Divide both sides by 50:
Answer: | y = 5