Answer and explanation

Correct answer: A. x = 4

  1. Step 1: Write 32 as 2⁵. Step 2. Equate exponents: x + 1 = 5. Answer: x = 4. Why not the others: x = 5 forgets the +1, 15 divides wrongly and 3 subtracts twice.

Practise more Algebra, Functions and Calculus.

Free questions with an explanation for every one, and full timed Tawjihi (Palestinian General Secondary Examination), Scientific Stream mock tests.