Question

1) Solve x+y=7, 2x - 3y = 9.​

Answer 1

Answer:

The value of x and y are 6 and 1 respectively.

Step-by-step explanation:

Solve the two equations simultaneously as follows:

$x+y=7....(i)\\2x-3y=9....(ii)$

Multiply equation (ii) by 3:

$3x+3y=21...(iii)$

Add (ii) and (iii):

$5x=30\\x=6$

Substitute x =6 in (i) and solve for y as follows:

$x+y=7\\6+y=7\\y=1$

The value of x and y are 6 and 1 respectively.