6m - 8 = 16
What is 4
9
3n - 10 = 5
What is 5
5y + 15 = 20
What is 1
-5 + 4y = 27
What is 8
5y = 100
What is 20
−10 = 2k − 2
What is -4
-2 - 4k = 10
What is -3