vammsgamingandvlogch vammsgamingandvlogch
  • 25-06-2020
  • Mathematics
contestada

The sum of two numbers is $30$. If we double the larger number, and subtract three times the smaller number, the result is 5. What is the positive difference between the two numbers?

Respuesta :

cda27243 cda27243
  • 25-06-2020

Answer: I think its 15

Step-by-step explanation:

Answer Link
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09pqr4sT 09pqr4sT
  • 25-06-2020

Answer:

[tex]8[/tex]

Step-by-step explanation:

[tex]x[/tex] is the larger number.

[tex]y[/tex] is the smaller number.

[tex]x+y=30\\2x-3y=5[/tex]

It becomes a simultaneous equation.

Let's solve for [tex]y[/tex]:

[tex]x=-y+30[/tex]

[tex]2x-3y=5\\2(-y+30)-3y=5\\-5y+60=5\\-5y+60+-60=5+-60\\-5y=-55\\y=11[/tex]

Let's solve for [tex]x[/tex]:

[tex]x=-y+30\\x=-11+30\\x=19[/tex]

Find out the positive difference between the two numbers.

[tex]x-y\\19-11\\=8[/tex]

Answer Link

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