Question

19a - 23b = 77 , 19b - 23a = -49 Therefore the solution set (a,b) is ______ *​

Answer 1

19a - 23b = 77 , 19b - 23a = -49

(19a - 23b) +(19b - 23a) =77+(-49),,(19a - 23) - (19b - 23a)=77-(-49)

-4a-4b = 28. 42a - 42b = 126

a+b = 28/-4. a-b = 126/42

a+b = (-7). a-b = 3

(a+b) + (a-b) = (-7)+3

2a = (-4)

a = (-4)/2 = (-2)

b = (a+b) - a

b= (-7) - (-2) = (-5)

Hope this will help........

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