Answer:
r = -6.1
Step-by-step explanation:
-7.8 = 4.4 + 2r
To get r, you need to isolate the variable
Subtract the 4.4 from both sides
-7.8 - 4.4 = 4.4 + 2r - 4.4
4.4 cancels out on the right
-12.2 = 2r
Divide both sides by 2
-12.2/2 = 2r/2
-6.1 = r
