Question 872526
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Hi
2x-3y=7
(a+b)x -(a+b-3)y = 4a + b
(a+b) = 2, a = {{{ 2-b}}}
4(2-b) + b = 7
 8 - 4b + b = 7
   1 = 3b
   1/3 = b  and a = 5/3   {{{2 - 1/3}}}