2x x 2x

Last updated on Dec 20, Candidates must go through the NDA1 previous year's papers. Attempting the NDA1 mock tests is also essential.

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2x x 2x

Just remember when there is no number or coefficient before a variable it is understood to be 1. If you have trouble remembering that I just suggest anytime you see a variable without a coefficient write in a "1" where the coefficient would be. When you are adding and subtracting equations, you add and subtract them just like you add and subtract numbers. Also, it sounds like you are trying to find the solution to a system of linear equations using elimination. If you are going to use this method, you need to eliminate one of the variables to solve for the other. Now, compare the two equations:. If you notice, I have decided to elimnate x remember, you can start by eliminating y if you want If I add the equations, then the terms containing x vanish and I have. You know, pick 20 or so random things to write where you're first adding, then multiplying. It seems like busy work, but because the idea is confusing if you think it through, it's worth it to spend 10 minutes or so just training your brain to do it. Next time you ask this question, think it through once, spend 10 minutes drilling the correct answer to your question, and you'll probably never stumble over this again. That's a page I took from martial art training, actually, where the idea is to train your muscles to know how to make the moves so you don't have to think through them. Same idea here, just different moves. When adding like numbers you just add. Get a free answer to a quick problem.

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2x x 2x

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