Answer:
4
Step-by-step explanation:
Just plug in -9 to the equation
6(-9) + 9y = -18
-54 + 9y = -18 isolate 9y
54 - 54 + 9y = -18 + 54
9y = 36 isolate y
9y/9 = 36/9
y = 4
Answer:
4
Step-by-step explanation:
1. Substitute the x value of -9 into the equation:
6(-9) + 9y = -18
2. Simplify
-54+9y = -18
3. Add 54 to both sides to get 9y by itself, the goal is to get y by itself
9y = 36
4. Divide by 9 on both sides to get y completely by itself
y = 4
