<PRE><B>Question 28856</B>
250X+40Y=1905
12X+5Y=19

250X+40Y=1905
-96X-40Y=-152 (MULTIPLIED BY -8)
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154X    =1753 OR X=1753/154 SUBSTITUTING X=1753/154 IN FORMULA #2 WE GET

12(1753/154)+5Y=19 OR 21036/154+5Y=19 OR 5Y=19-21036/154 OR 

5Y=(2926-21036)/154 OR 5Y=-18110/154 OR Y=(-18110/154)/5 OR Y=(-18110/154)1/5

OR Y=-18110/770 OR Y=-1811/77

PROOF 12(1753/154)+5(-1811/77)=19 OR 21036/154-9055/77=19 OR 

21O36/154-18110/154=19 OR 2926/154=19 OR 19=19. 

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