math
posted by al .
substitution
4x + 3y = 3
7x  9y = 6

from the 1st
3y = 34x
or 9y = 9  12x
now sub that into the 2nd
7x  (912x) = 6
19x = 15
x = 15/19
back into 3y = 34x
3y = 3  60/19 = 3/19
y = 1/19
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