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If 2A+B=9, which of the following correctly expresses A in terms of B ?

If 2A+B=92A+B=9, which of the following correctly expresses AA in terms of BB?

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Full solution

Q. If 2A+B=92A+B=9, which of the following correctly expresses AA in terms of BB?
  1. Isolate A in Equation: We are given the equation 2A+B=92A + B = 9. To express AA in terms of BB, we need to isolate AA on one side of the equation.
  2. Subtract BB from Both Sides: Subtract BB from both sides of the equation to get 2A=9−B2A = 9 - B. This step moves BB to the other side of the equation, making it easier to solve for AA.
  3. Divide by 22 to Solve for A: Divide both sides of the equation by 22 to solve for A. This gives us A=9−B2A = \frac{9 - B}{2}. Dividing by 22 isolates A, giving us the expression of A in terms of B.

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