First, solve for y
1. Distribute the -2 using the distributive property
-2 x 3y + -2 x 5 = -4
-6y - 10 = -4
2. Combine like terms by adding 10 to both sides.
-6y = 6
3. Solve for y by dividing both sides by -6
y = -1
Second, plug your answer into 5y
5(-1) = -5
5y = -5