Question

4 (×+2)+5 (y+2)=20;5x+4y=7​

Answer 1

Answer:

x= 3 and y = -2

Step-by-step explanation:

4(x+2)+5(y+2)= 20

= 4x +8+5y +10 =20

=4x + 5y = 2. .......................is equation 1

5x + 4y = 7 .......................is equation 2

now adding two equation we get,

9x + 9y = 9

therefore x + y = 1.................is equation 3

Now subtracting two equation we get,

x - y = 5.....................is equation 4

now equation 3 and 4 add we get

2x = 6

therefore x = 3

and y = -2