mgmyc1 mgmyc1
  • 03-02-2020
  • Mathematics
contestada

0.7x-y=4.22
5-0.8x= 0.2y

Respuesta :

joshnajd joshnajd
  • 08-02-2020

The solution of the set of equation is

x=6.217

y=0.132

Step-by-step explanation:

given the set of equations

0.7x-y=4.22(1)

5-0.8x=0.2y

-0.8x-0.2y=-5   (2)

multiply (1) and(2) by 10

7x-10y=42.2(3)

-8x-2y=-50(4)

solve (3) and (4) using elimination method

[tex](4)\times 5[/tex]

⇒-40x-10y=-250(5)

(5)-(3)

-47x=-292.2

x=6.217

substituting value of x in 3

we get y=0.132

Answer Link

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