WILL GIVE BRAINLIST AND THANKS IF CORRECT. QUESTION IS IN THE SCREENSHOT

Answer:
-30
Step-by-step explanation:
Add 3 in place of x in the equation, and multiply it by -10. The y is already isolated, so the equation finishes as y = -30.
Answer:
y=-30
Step-by-step explanation:
x=3, and so if 3*-10 is the answer, then y will equal -30