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GaryK [48]
3 years ago
15

4x-9y=9

Mathematics
1 answer:
Alexxandr [17]3 years ago
5 0
Multiply both sides of the second equation by 4. That will give you -4x in the second equation which when added to 4x of the first equation will eliminate x.

Second equation:
-x + 3y = 6

Multiply the second equation by 4 on both sides:
-4x + 12y = 26
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you use the formula a^2+b^2=c^2

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3*3=9 and 4*4=16

16+9=25

square root of 25 is 5.


5 is the answer
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