Question

6 a - B = 100
a + 9B = 81
Find a and b?
I need step by step and I will mark it the branliest answer.​

Answer 1

Answer:

multiply equation 2 × 6

then it becomes 6a + 54b = 486

solving 1 and 2

6a -b = 100

6a + 54b = 486

___________

here 6a and 6a gets cancelled

then -55b = -386

b = 386 /55

substitute b value in either equations 1 or 2

then you will get a value....

Step-by-step explanation:

PLEASE MARK ME AS BRAINLIEST ....PLSE...

Answer 2

Step-by-step explanation:

here is ur solution

6a - b = 100

a + 9b = 81

subtracting we get,

5a - 10b = 19

5( a -2b) = 19

a - 2b = 19/5

now,

a+9b = 81

a - 2b = 19/5

subtracting

11b = 81 - 3.8

11b = 77.2

b = 7.018

therefore, a = 18(appeox)