x + 2y = 3

Question

x + 2y = 3

3y - x = 2

 

 

find dy

 

      b2

 

      b1

 

      c2

      c1

Answer 1

I don't really understand you questions, is it find y?

 

x + 2y =3

-x +3y = 2            (you can switch the x and y positions)

5y = 5                  (I added knowing x is different sign same coefficient they cancel)

y = 1                    (divided 5 on both sides)

 

Find x by substituting in either equation.

 

x + 2*1 = 3        (substituting y =1 in the first equation)

x = 1                  (subtracted 2 on both sides)

 

 

Answer (1,1)