Question

Solve
7(x + 2) + 3(y - 2) = 8
3(x - 2) + 7(y + 2) = 8

Answer 1

Answer:

x = 0, y = 0

Step-by-step explanation:

7x + 14 + 3y - 6 = 8 => 7x + 3y + 8 = 8 => 7x + 3y = 8 - 8

=> 7x + 3y = 0 ------> 1st eq.

3x - 6 + 7y + 14 = 8 => 3x + 7y + 8 = 8 = 3x + 7y = 0 ----> 2nd eq.

Multiply 1st eq. with 3 and 2nd equation with 7

1st eq. ---> 21x + 9y = 0

2nd eq. ---> 21x + 49y = 0

Now subtract both the equations

21x + 9y = 0

-21x - 49y = 0

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

-40y = 0

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

40y = 0 => y = 0

Substitute y=0 in 1st eq.

=> 7x + 3(0) = 0

=> 7x = 0

= x = 0