Hello, MariaBlood777!

in Calc Chat (step by step) they multiplied 1/2(R2) first then did -R2 + R1 and so forth.

I can see why they did that, but it's a very strange opening move.

I thought I was suppose to multiply 1/3(R1) first to get 1 on R1 and so forth.

That is correct, but there are other ways to get 1 on R1.

We can do it "your way", but it will introduce fractions.

If you can handle them, great!

. . . .

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. . . .

Therefore: .