Question

if 2x+3y =17 and 2x+2-3y+1=5,then y =​

Answer 1

Answer:

y = 45/2

step by step explanation:

2x+3y=17

or, 3y=17-2x

or, y=17-2x ....(i)

             3

2x+2-3y+1=5

or, 2x+3-5=3y

or, 2x-2=3y

or, 2x-2 = y....(ii)  

        3

now, from eqn i and ii

or,17-2x = 2x-2

        3          3

or, 3(17-2x) = 3(2x-2)

or, 51 - 6x = 6x - 6

or, 51 + 6 = 6x + 6x

or, 57 = 12x

or, 57/12 = x

or, x = 57/12

Now, putting x = 57/12 in eqn ii,

y=2x-2

      3

  =  2*57/12 -2

              3

  = 57/6 - 2

         3

   = 57-12/6

            3

   = 45/6

         3

   = 45 * 3

       6

     = 45

          2

therefore y=45

                      2