SOLUTION: This is the question I need help on: At McDonald's four cheeseburgers and three medium fries have a total of 2290 calories. Six cheeseburgers and two medium fries have 2560 calorie

Question 845812: This is the question I need help on: At McDonald's four cheeseburgers and three medium fries have a total of 2290 calories. Six cheeseburgers and two medium fries have 2560 calories. How many calories does each item contain?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
x = how many calories in one cheeseburger
y = how many calories in the medium serving of fries

and .

Multiply the second equation by , and then solve the system using the elimination method at least for x.

----------------Continued-------

, the second equation.

Use the System As:
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9x+3y=3840
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4x+3y=2290
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Eliminating y---Subtract the "2290" equation from the "3840" equation.

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Next, using any equation you want, solve for y ...
6x+2y=2560
3x+y=1280
y=1280-3x
y=1280-3*310
y=1280-930

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