Y=x+8 y=9x+72 substitution

x = -5

step-by-step explanation:

step-by-step explanation:

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twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2

the answer is 0.8in^2

hope you get it down chief.