Solve for x: .
Answer and explanation
Correct answer: D.
- Step 1: Write .
- Step 2: Equate the exponents: , so .
Answer
.
Why not the others: : the exponent 2x was read as x. : the exponent was multiplied instead of divided by 2. : 2 was added instead of divided out.
Practise more Algebra, equations and inequalities.
Free questions with an explanation for every one, and full timed South Africa Matric mock tests.