Question

x+y=19

4,5*x+17y+18=166 rozwiążcie równanie proszę ;)

Answer 1

x+y=19

4,5*x+17y+18=166

 

x=19-y

4,5(19-y)+17y+18=166

 

x=19-y
85,5-4,5y+17y=166-18

 

x=19-y

12,5y=148-85,5

12,5y=62,5

 

x=19-y

y=5

 

x=19-5

y=5

 

x=14

y=5

 

no to tyle

Answer 2

x+y=19     / * (-4,5)

4,5*x+17y+18=166

 

-17x-17y = -323

+         4,5x+17y = 148

__________________

 

-12,5x= -175  /: (-12,5)

x=14

 

x+y=19

14+y=19

y=19-14

y-5

 

x=15

y=5

 

Pozdrowienia;**