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
