Multiple choice

In the expression $\displaystyle 2.5+0.05-\left [ 1.6-\left { 3.2 - \left ( 3.2+2.1\div x \right ) \right } \right ]=0.65$, find the value of $x$.

  1. 8

  2. 9

  3. 6

  4. 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Simplify the expression step by step: 2.5 + 0.05 - [1.6 - {3.2 - (3.2 + 2.1/x)}] = 0.65. This simplifies to 2.55 - [1.6 - {3.2 - 3.2 - 2.1/x}] = 0.65, which becomes 2.55 - [1.6 + 2.1/x] = 0.65. Solving 0.95 - 2.1/x = 0 gives x = 2.1 / 0.3 = 7.

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