Respuesta :

drinks, x
popcorn, y

40.50 = 9x + 4y
38.25= 3x + 5y

Multiply the 2nd row by 3
9x+4y=40.50
9x+15y=114.75

Subtract the 2nd row from the 1st row
−11y=−74.25
Solve for y

Substitute y=6.75
9x+4(6.75)=40.50
9x+27=40.50
Subtract 27 from both sides
9x=40.50−27
9x=13.5
Divide both sides by 9

I'll let you do some of the work ;)

Hope this helps

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