Solve the system of linear equations by substitution x-y=2 x+2y=5

x = 3

y = 1

Step-by-step explanation:

x - y = 2    (I)

x + 2y= 5 (II)

x - y = 2

   x = 2 + y       (III)

Substitute x = 2 + y in equation (II)

2 + y + 2y = 5           {combine like terms}

     2 + 3y  = 5

           3y  = 5 -2

            3y = 3

              y = 3/3

y = 1

Substitute y = 1 in equation (III)

x = 2 + 1

x = 3

c) the median for town a 30" is greater than the median for town b 25"

step-by-step explanation:

town a, median = q2 = 30

town b, median - q2 = 25

so the median for town a 30" is greater than the median for town b 25"