Question

7x+11y=40
9x+7y=30
solve by substitution method​

Answer 1

Answer:

7x+11y=40..........(1)

9x+7y=30............(2)

from equation first

x=(40-11y)/7...........(3)

putting the value of x in equestion second

9×(40-11y)/7+7y=30

(360-99y+49y)/7=30

-50y=210-360

-50y=-150

y=3

putting the value of y in equestion third

x=(40-11×3)/7

x=7/7

x=1

Answer 2

Answer:

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