Answer:
The value of r is 1.
Step-by-step explanation:
-11r + 88 = 77 Subtract 88 from both sides
-11r = -11 Divide -11 on both sides to isolate the variable, r.
r = 1
You must isolate the variable in order to solve equations with variables.
Isolating variable is basically when you divide, multiply, add, or subtract to put a variable on ONLY one side of the equation.
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