Question

x +2y=9
2x + y= 8
solve this linear equation in two variables​

Answer 1

x + 2y=9-------1

2x+ y=8--------2

Multiplying equation 1 by 2,

we get,

2x + 4y = 18-------3

Subtracting equations 2 & 3

we get,

-3y = -10

y = 10/3

Substituting it in 2

we get,

2x + 10/3 = 8

6x + 10 = 21

6x= 21-10

x= 11/6