Question 77644
QUESTION:


a - 2b = 2
a + b = 2(b+3)


ANSWER:


a - 2b = 2  -----------(1)


a + b = 2(b+3)


==> a + b = 2b + 6


==> a + b - 2b = 6


==> a - b = 6 ----(2)


(1) - (2) ==>

==> a - 2b - (a- b) = 2 - 6


==> a - 2b - a + b = -4


==> -b = -4


==> b = 4


Now substitute the value b = 4 in (2)


==> a - 4  = 6


Add 4 on both sides,


==> a = 6 + 4


==> a = 10

  

So the solution is  a = 10 and b = 4



Hope you understood.



Regards.


Praseena.