Question

solve 5x+7y=50, 7x+5y=46 by graphical method​

Answer 1

Answer:

(3, 5)

Step-by-step explanation:

5x + 7y = 50

7x + 5y = 46

For 5x + 7y = 50,

x = (50 - 7y)/5

X 3 10 -4

Y 5 0 10

For 7x + 5y = 46,

x = (46 - 5y)/7

X 8 3 -2

Y -2 5 12

From the figure, it can be observed that these lines intersect each other at point (3, 5).

Answer 2

Answer:

5x+ 7y = 50

7x + 5y = 46

--------------------

12x+ 12y = 96

12 (x + y )=96

x+y = 96 ÷12

x+y = 8

x = 8- y

put x= 8- y in 5x+ 7y = 50

5(8-y) +7y =50

40-5y +7y = 50

-5y+7y=50-40

2y = 10

y= 10÷2

y=5

put y=5 in x= 8- y

x= 8-5

x=3