solve x+y=10 .5y+.2x=.38(10)

Question

need to check answer

Answer 1

 

x+y=10

 

and

 

0.5y+0.2x=3.8

 

 

Same process as the previous questions....

 

y=10-x

 

now replace the y in the second equation with this expression

 

0.5(10-x) + 0.2x =3.8

 

5 - 0.5x + 0.2x = 3.8

 

5 - 0.3x = 3.8

 

-0.3x = 3.8 - 5

 

-0.3x = -1.2

 

x=4

 

 

so y=6 since x+y=10