Question

this is a question from simultaneous equation by substitution method​

Answer 1

Answer:

x=y=20/7

Step-by-step explanation:

hope it will be helpful

Answer 2

Answer:

x=5

y=2

(x+y)/(x-y)=7/3

3x+3y=7x-7y

x=10y/4

By substitution

1/(10y/4)+1/y=7/10

4/10y+1/y=7/10

(4y+10y)/10y^2=7/10

140y=70y^2

y=2

1/x+1/y=7/10

1/x=7/10-1/2

1/x=1/5

x=5

y=2

x=5