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what is GK

I am not able to fill up my cat form. kindly assist.

i want to change language english
to hindi but i can't...

hi I gave the free mock on ssc cgl and I got my score.but i wanted to know the cutoff marks for the test so that I could compare my score

What is this?

Can't language change in to hindi?

Find x+y if 90/3x-y + 46/2x+3y =7 and 92/2x+3y - 36/3x-y =2 .
I tried solving this by substituting a for 1/3x-y and b for 1/2x+3y to form an equation.
The equation is 90a+46b=7~(1)
and 92b-36a=2~(2). But i cant get it any further by substituting values.The solution just mention that equation (1) is multiplied by 2 and subtracted by (2) to get an equation say (3) . Then we substitute values to get (4) equation multiply equation (3) by 3 and ADD it into (4). But why? why do we multiply it and add/subtract it like that. i dont get the concept. The thing is that it would be easy if i can get a step by step solution and the reason for the steps taken. Thank You.

bhai kisi ko pass mock bachi hoto I'd batado

can you please anyone help me to solve this problem
On dividing a certain number by 342, we get 47 as reminder. If the same number is divided by 18, what will be the reminder

Sir Language Hindi