X-y=3=>x=3+y
X+2y=-6
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3+y+2y=-6
3+3y=-6
3y=-6-3
3y=-9
y=-3
X+2y=-6
X+2(-3)=-6
X-6=-6
X=0
I thought they would be the same so I would go with B. 85
Yes you do need to regroup it would be 4
You could buy 6 keychains spending 4 dollars each. 6 * 4 = $24.
