danasonggg1
danasonggg1 danasonggg1
  • 24-05-2017
  • Mathematics
contestada

#7 please! Thanks!!❤️

7 please Thanks class=

Respuesta :

PHDFlopper
PHDFlopper PHDFlopper
  • 24-05-2017
Set up a system of equations:
x=number of cars washed
y=number of trucks washed

x+y=122
3x+5y=510

Solve using elimination:
Multiply the first equation by -3:
-3x-3y=-366
3x+5y=510

Add the two equations together:
2y=144
y=72

The answer is 72 trucks
Answer Link
Аноним Аноним
  • 24-05-2017
72 trucks is the answer to the problem.
Answer Link

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