Question

pls help with this question and write the steps

Answer 1

Answer:

12 is his present age

Step-by-step explanation:

Let his present age be x

Aftee 3 years means x + 3x

Now 9vyears ago means x - 9

Now A/Q

x + 3 = 5 (x - 9)

x + 3 = 5x - 45

-5x + x = -45 -3

-4x = -48

x = -48/-4

x = 12

So 12 is the present age of Rahul

I hope it helps you.

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Answer 2

THE METHOD OF PREPARING A SILICIC ACID SOL COMPRISING FORMING A SILICA HYDROGEL BY REACTING AN ACID WITH A WATER SOLUBLE SILICATE AT A PH ABOVE 7, WASHING SAID HYDROGEL TO REMOVE SOLUBLE CONSTITUENTS AND WITHOUT FURTHER TREATMENT THEREOF HEATING THE WASHED HYDROGEL ALONE UNDER NON-EVAPORATIVE CONDITIONS TO FORM A