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OpenStudy (anonymous):
HELP ME PLEASE!!!!! can u solve simultaneously: 7/x - 5/y = 3 2/x + 25/2y = 12 please include working out please. thank you
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OpenStudy (danjs):
you can multiply the first one by -2, and the second one by 7, then add them together
OpenStudy (danjs):
-14/x + 10/y = -6 14 /x + 175/2y = 84 -----------------------
OpenStudy (anonymous):
ohhh
OpenStudy (danjs):
when you add the two equations, the x variable will go away so you can solve for y
OpenStudy (anonymous):
i get it now thank you
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OpenStudy (danjs):
welcome
OpenStudy (danjs):
fory linear systems you can - multiply equations by constants - add equations - change order of equations
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