Question

2a-3b=15 ; 8a+5b=77​

Answer 1

Answer:

a = 9 and b = 1

Step-by-step explanation:

2a - 3b = 15   ---> (1)

8a + 5b = 77  ---> (2)

(1) x 5 =>    10a - 15b = 75

(2) x 3 =>  24a + 15b = 231  [ + ]

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                34a           = 306

=>   a = 306 / 34

a = 9

Substituting value of a in (1),

2(9) - 3b = 15

18 - 3b = 15

3b = 18 - 15

3b = 3

b = 1

Hope it is useful...

Answer 2

Answer:

give me how it come 8a-12b=60