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What operation would isolate the variable?
x−8 = 13

A. Subtract 13 from each side of the equation.
B. Subtract 8 from each side of the equation.
C. Add 13 to each side of the equation.
D. Add 8 to each side of the equation.

Answer :

madison2014nc

Answer:

D.

Step-by-step explanation:

adding 8 cancels it out on side with x, the left side

fichoh

Isolating a variable is used to solve for the value of that variable in an equation. To isolate x in the equation given, we add 8 from both sides of the equation.

Given the equation :

  • x - 8 = 13
  • We need an operation to eliminate the constant value on the left hand side of the equation.
  • Add +8 to both sides of the equation.
  • x - 8 + 8 = 13 + 8
  • x = 21

Therefore, the operation required is the addition of 8 to both sides of the equation.

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