Question 54683
IN ORDER TO ELIMINATE ONE VARIABLE WE NEED TO MULTIPLY THE FIRST EQUATION BY 

-.09 TO ELIMINATE THE X VARIABLE THUS 

-.09X+-09Y=-45
.09X-.11Y=-20  NOW WE CAN ADD THESE TWO EQUATION
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-.2Y=-65 OR Y=-65/-.2 OR Y=325 & X+325=500 OR X=500-325 OR X=175

PROOF .09*175+20=.11*325 OR 15.75+20=35.75 OR 35.75=35.75