Question

solve by substitution method 4x-2y=9 , 3x-4y=4​

Answer 1

Answer:

4x-2y=9.......eq 1

3x-4y=4.........eq 2

3(4x-2y=9)

4(3x-4y=4)

12x-6y=27

12x-16y=16

- + -

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

10y=11

y=11/10

putting the value of y in eq. 2

3x-4y=4

3x-4(11/10)=4

3x-44/10=4

3x-44/10=4

3x-44=40

3x=40+44

3x=84

x=84/3

x=28

therefore, x=28 and y=11/10