jessicabogardus1 jessicabogardus1
  • 07-11-2020
  • Mathematics
contestada

If 7x + 5y = 25 and 3x + 2y = 10, what is the value of x +y?

Respuesta :

ciyiwod326 ciyiwod326
  • 07-11-2020

Answer:

Step-by-step explanation:

7x+5y=25

3x+2y=10

21x+15y=75

21x+6y=30

0x+11y=45

11y=45

y=45/11

y = 4.09

sub in 4.09 into equation 1

7x+5(4.09)=25

7x+20.45=25

7x=25-20.45

x=4.55/7

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