Question 1083825
4x+450y=240.50; x= days, y= miles driven
3x+200y=146.00
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12x+1350y=721.50
-12x-800y=584
-550y=-137.50
y=$0.25 per mile
substitute into first
4x+112.5=240.50
4x=128
x=$32 per day
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Check in second
96+50=146