How Can You Elimanate This To Get Just A Or B?
2025a+45b=-1.39
324a+18b=1.81

Question

How Can You Elimanate This To Get Just A Or B?
2025a+45b=-1.39
324a+18b=1.81

littlebird · Answer

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littlebird · Answer

In my solution I decided I wanted to eliminate b.
In order to do this, I multiplied all of the second equation by 2.5 so that 18b can become 45b.
Then, I can subtract that equation from the first one.
This will eliminate b, leaving me with a.
Finally I solved for a.

This question can be solved in other ways. I could have changed the second equation so that a was eliminated instead of b.
I also could have started by changing the first equation rather than the second one.

anonymous · Answer

Thank You So Much! Ive Been Trying To Figure That Out Since Last Night.

anonymous · Answer

Wouldnt 2.5 Be Negative Though So B Will Cancel Out?