Math, asked by priyaj2209, 4 months ago

find the value of x+y for the given equation 9x+11y=78;11x+9y=72

Answers

Answered by vaidik10

2

Step-by-step explanation:

9x+11y=78

+11x+9y=72

20x+20y=150

2x+2y=15

9x+11y=78

-11x-9y=-72

-2x+2y=6

2x+2y=15

-2x+2y=6

4y=21

y=21/4

x=9/4

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