Tyoung
Tyoung
16-03-2015
Mathematics
Answered
What is the intersection point of 2x+19y=3 and 1x-3=7y
Answer :
Since3122015
Since3122015
16-03-2015
[tex]2x+19y=3\\19y=-2x+3\\y=-\frac{2}{19}x+\frac{3}{19}\\\\x-3=7y\\y=\frac{1}{7}x-\frac{3}{7}\\\\-\frac{2}{19}x+\frac{3}{19}=\frac{1}{7}x-\frac{3}{7}\\-\frac{14}{133}x+\frac{21}{133}=\frac{19}{133}x-\frac{57}{133}\\\frac{78}{133}=\frac{33}{133}x\\\frac{78}{33}=x\\x=\frac{26}{11}\\\\(\frac{26}{11})-3=7y\\(\frac{26}{11})-\frac{33}{11}=7y\\\frac{-7}{11}=7y\\-11=y[/tex]
(26/11, -11)
Answer Link
Panoyin
Panoyin
19-03-2015
2x + 19y = 3 ⇒ 2x + 19y = 3 ⇒ 2x + 19y = 3
1x - 3 = 7y ⇒ 1x - 7y = 3 ⇒
2x + 14y = 6
5y
=
-3
5 5
y = -3/5
2x + 19(-3/5) = 3
2x - 11 2/5 = 3
+11 2/5 +11 2/5
2x
=
14 2/5
2 2
x = 7 1/5
(x, y) = (7 1/5, -3/5)
Answer Link
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