runnergir1 runnergir1
  • 22-01-2022
  • Mathematics
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Help! Will give brainly :)

Help Will give brainly class=

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Bromine67
Bromine67 Bromine67
  • 22-01-2022

Answer:

a= 20

b=20

Step-by-step explanation:

9b-6a-20 = b+a

or, 8b-7a-20 = 0

or, 8b = 20+7a

or, b = (20+7a)/8

now

a-2b+34 = 9b-10a+34

substituting b's value as (20+7a)/8

or, a-2(20+7a)/8+34 = 9(20+7a)/8-10a+34

or, a-(20+7a)/4 = (180+63a)/8-10a

or, (4a-20-7a)/4 = (180+63a-80a)/8

or, -3a-20 = (180-17a)/2

or, -6a-40 = 180-17a

or, 11a=220

a = 20

now

b=(20+7a)/8

or, b = (20+7×20)/8

or, b = (20+140)/8

or, b = 160/8

so, b = 20

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