तुलनात्मक विधि से बनना हैं
समीकरण हल करे
X + y =7
5x + 12y =7
Answers
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Step-by-step explanation:
x+y=7. ______(i). ×5
5x+12y=7 ______(ii)
______________
5x +5y =35
5x +12y =7
(-) (-) (-)
__________
-7y=28
y=28/-7
y=-4
substitute y=-4 in equation (i)
x+(-4)=7-4
x-4=7
x=7+4
x=11
x=11, y=-4
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