Math, asked by saniaanil365, 1 year ago

4x+6y=15 and 3x-4y=7 solve using cross multiplication

Answers

Answered by premkumar27
26
4x+6y=15 12x+18y=45
3x-4y=7 12x-16y=28
_________ _________
x=3, 34y=17
y=1/2 y=1/2
your answer now put
value of y
then value of
x will be 3

ansh689172: how
premkumar27: with solution
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premkumar27: just i giving
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Answered by thameshwarp9oqwi
28

4x+6y=15

3x-4y=7

         X             Y             -1

6            15             4               6

-4            7              3                -4

==> X/(42+60)   =     Y/(45-28)    =     -1/(-16-18)

==> X/102        =    Y/ 17        = -1/-34

==> X/102 = -1/-34       AND       Y/17 = -1/-34

==>  X = -102/-34        AND        Y = -17/-34

==> X = 3               AND          Y = 1/2


I HOPE ITS HELPFUL


thameshwarp9oqwi: i hope its helpful
premkumar27: yes
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