Question

Solve using cross multiplication method: x+y=7
2x-3y=11

Answer 1

(1) Given Equation is x + y = 7

                                    x = 7 - y      --------- (1)

(2) 2x - 3y = 11

     2(7 - y) - 3y = 11

     14 - 2y - 3y = 11

      14 - 5y = 11

           -5y = 11 - 14

          -5y = -3

             y = $\frac{3}{5}$


Substitute y = $\frac{3}{5}$ in (1), we get

x = 7 - $\frac{3}{5}$
  
   = $\frac{35 - 3}{5}$

   = $\frac{32}{5}$


Therefore the value of x = $\frac{32}{5}$, y = $\frac{3}{5}$


Hope this helps!

Answer 2

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