2x+3y=18 ; -7x+9y=15 by cross multiplication method pls.... very aurjent pls......................
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hello
here we go
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2x+3y=18
-7x+9y=15
equation (1)x 7
equation (2)x 2
14x + 21y = 54
-14x + 18y = 30
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39y = 84
=> y = 84/39
=> y = 2.1 = 2
and
=> 2x + 3(2) = 18
=>2x + 6 = 18
=>2x = 12
=> x = 6
hope it helps
ramya321:
pls... send in cross multiplication pls......
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