Asked by al
substitution
4x + 3y = 3
7x - 9y = 6
4x + 3y = 3
7x - 9y = 6
Answers
Answered by
Reiny
from the 1st
3y = 3-4x
or 9y = 9 - 12x
now sub that into the 2nd
7x - (9-12x) = 6
19x = 15
x = 15/19
back into 3y = 3-4x
3y = 3 - 60/19 = -3/19
y = -1/19
3y = 3-4x
or 9y = 9 - 12x
now sub that into the 2nd
7x - (9-12x) = 6
19x = 15
x = 15/19
back into 3y = 3-4x
3y = 3 - 60/19 = -3/19
y = -1/19
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