Question

9. Solve the following pair of linear equations by any method
2x + y = 11
X+ y = 8​

Answer 1

Answer:

(1) y=11-2x

=9x

(2) 9x+y=8

y=9x-8=1x

Answer 2

Answer:

x=21/2, y=(-5)/2

Step-by-step explanation:

2x+y=11--eq1

x+y=8--eq2

->x=8-y

Substituting x=8-y in eq1

2x+y=11

2(8-y)+y=11

16+2y=11

2y=11-16

2y=(-5)

y=(-5)/2

Substituting y=(-5)/2 in eq2

x+y=8

x+(-5)/2=8

x-5/2=8

x=8+(5/2)

x=16+5/2

x=21/2