Question 75

what is the value of $$x$$, if $$\left[0.9\left\{1.1-0.3\left(0.3-0.2\div0.5\right)+0.4\right\}\right]\div0.81$$ = $$x$$ +1 ?

Solution

Lets solve this question by using rule of BODMAS.

$$\left[0.9\left\{1.1-0.3\left(0.3-0.2\div0.5\right)+0.4\right\}\right]\div0.81$$ = $$x$$ +1

$$\left[0.9\left\{1.1-0.3\left(0.3-0.4\right)+0.4\right\}\right]\div0.81=x+1$$

$$\left[0.9\left\{1.1+0.03+0.4\right\}\right]\div0.81=x+1$$

$$\left[0.9\left\{1.53\right\}\right]\div0.81=x+1$$

$$\left[1.377\right]\div0.81=x+1$$

$$1.7-1=x$$

$$x=0.7$$

Hence, Option B is correct.

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