Answer and explanation

Correct answer: C.

  1. Step 1: Multiply both sides by : .
  2. Step 2: Subtract : .
Answer
.
Why not the others: is what you get if you forget to multiply by . is what you get if you move across without changing its sign. is what you get if you add the constant before multiplying.

Practise more Algebra and Equations.

Free questions with an explanation for every one, and full timed GCE O/L Mathematics (Sri Lanka) mock tests.

Solve (x + 3)/4 = 4. | GCE O/L Mathematics (Sri Lanka)