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sergiy2304 [10]
3 years ago
13

Deshaun's gas tank is 1/3 full. After he buys 3 gallons of gas, it is 1/2 full. How many gallons can Deshaun's tank hold?

Mathematics
1 answer:
rusak2 [61]3 years ago
6 0

Answer:7 gallons

Step-by-step explanation:

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To calculate the average you add up all the scores and divide by the number of scores (5)
add all the current test scores and allow X to be the unknown score:
92+80+88+93+X: or 353 + X

set up equation:

(353+X)
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Multiply both side of the equation by 5 to clear the fraction resulting in:

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Subtract 353 from both sides of the equation:

x = 97

So the test score needed to get a 90 average is 97.
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Step-by-step explanation:

-2x-14=7x+6\\\\\mathrm{Add\:}14\mathrm{\:to\:both\:sides}\\-2x-14+14=7x+6+14\\\\Simplify\\-2x=7x+20\\\\\mathrm{Subtract\:}7x\mathrm{\:from\:both\:sides}\\-2x-7x=7x+20-7x\\\\Simplify\\-9x=20\\\\\mathrm{Divide\:both\:sides\:by\:}-9\\\frac{-9x}{-9}=\frac{20}{-9}\\\\x=-\frac{20}{9}\\\left(\mathrm{Decimal}:\quad x=-2.22222\dots \right)\\x =-2.2

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