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pensil=y
3x+4y=13.250|.2|6x+8y=26.500
2x+3y=9.250 |.3| 6x+9y=27.750_
-y= -1.250
y=1.250
3x+4y=13.250
3x+4(1.250)=13.250
3x+5000=13.250
3x=13.250-5000=8.250
2x+5y =2(8250)+5(1250)
=16500+6250=22.750