Question

9a+4b=30, 5a-3b=1 solve in elimination method​

Answer 1

Step-by-step explanation:

9a+4b=30 ...(1)

5a-3b=1 ...(2)

On Multiplying eq 1 by 3 and eq 2 by 4, we get

=> 27a+12b=90. ..(4)

=> 20a -12b=4. ..(5)

On adding eq 4 and 5, we get

=> 47a =94

=> a=94/47

=> a=2

Putting a= 2 in eq 1, we get

=> 9×2+4b=30

=> 18+4b= 30

=> 4b= 30-18

=> 4b=12

=> b= 12/4

=> b=3

Hence, a =2 and b=3