Question 79690
MULTIPLY THE FIRST EQUATION BY 4 WE GET
12X+20Y=24 NOW MULTIPLY TH ESECOND EQUATION BY 3 WE GET:
-12X+6Y=15 NOW WE ADD TOP GET RID OF THE X TERMS THUS:
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26Y=39
Y=39/26
Y=3/2 ANSWER. 
NOW SUBSTITUTE 3/2 FOR Y & SOLVE FOR X IN EITHER EQUATION.
3X+5(3/2)=6
3X15/2=6
3X=6-15/2
3X=(12-15)/2
3X=-3/2
X=-3/2*1/3
X=-1/2 ANSWER.