SOLUTION: Can anyone help solve each system by the addition method? 3/7x+5/9y=27 1/9x+2/7y=7 ----------- 3x-2.5y=7.125 2.5x-3y=7.3125 ----------- - Thanks so much!!

You just need to get rid of the fractions in the first
and get rid of the decimals in the second.



Multiply the first equation through by the LCD of 63.
Multiply the second equation through by its LCD, which just
happens to be 63 also.



That becomes



Can you solve that? If not post again asking how.

Answers: x=63, y=0

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Get rid of the decimals by multiplying through by 10000



You can divide the first one through by 1250 and the
second one through by 625:



Can you solve that? If not post again asking how.

Answers: , 

Edwin