Question

solve 2a+b=1 and -a+b=10​

Answer 1

Answer:

-a+b=10

b=10+a   eq 1

 2a+b=1

  2a+10+a=1           using eq 1

  2a+a=1-10

     3a=-9

 a= -9/3= -3

  in eq 1,b=10+a

             b=10-3=7

   

Step-by-step explanation:

Answer 2

Answer:

Ex

2a+b=1 equation first

-a+b=10 equation second

from equation first and second

3a=11

a=11/3

putting the value in equations first

2a+b=1

2into11/3 +b,=1

22/3+b=1

b=1-22/3

b=-21/3

b=-7