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OpenStudy (danielbarriosr1):
John and 2 friends are going out for lunch. They split one pizza and each had a large drink. He determined that the cost of three drinks plus $3.00 is only $1.55 less than the cost of a pizza. A pizza is six and one-half times the cost of one drink. What is the cost of a drink?
OpenStudy (anonymous):
@AccessDenied I need you again !
OpenStudy (danielbarriosr1):
Thanks
OpenStudy (anonymous):
3 drinks +$3 = pizza - $1.55
pizza= 6½ × drink
OpenStudy (danielbarriosr1):
3d+3=p-1.55
p=6.5d
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OpenStudy (danielbarriosr1):
Should I use the substitution method?
OpenStudy (anonymous):
lets work further...
3 drinks +$3 = pizza - $1.55 add $1.55 dollar to both sides ( Because if saying that pizza is 1.55 dollars less than, is same as saying that drinks +$3 is 1.55 more than the pizza )
3 d +$3 = p - $1.55
3 d +$3 +$1.55= p
3 d +$4.55= p
So you now have,
3 d +$4.55= p
p= 6.5 d
yes. sub...
OpenStudy (anonymous):
I got the same equation, except that I simplified the first one a little bit more.
OpenStudy (danielbarriosr1):
3d+4.55=6.5
4.55=3.5d
1.3=d
OpenStudy (danielbarriosr1):
Is it 1.3?
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