Rearrange the equation so b is the independent variable 4a+b=−52

The independent variable is the variable you change.

The dependent variable is the variable you measure that depends on the independent variable.

Since b is the independent variable, you need to isolate/get the variable "a" by itself in the equation:  [this is because "b" is the variable you change, and "a" is the variable you measure that results/depends on "b"]

4a + b = -52       Subtract b on both sides

4a + b - b = -52 - b

4a = -52 - b        Divide 4 on both sides to get "a" by itself

the answer is c hope it

step-by-step explanation: