Question

solve for X and y 7x- 8y - 11 = 0 and 8x - 7y - 7 = 0

Answer 1

 elimination method       hint: * this means multiplie

7x - 8y =11            *8                               
8x -7y  = 7              *7

56x -64y =88
56x -49y =49

          -15y = 39
                 y = -39/15

i am substituting this in  7x - 8y = 11

7x -8 *  -39/5 = 11
7x  + 312/5 = 11

35x +312÷5 = 11
35x = 55-312
35x = 257
  x  =  257/35

hence solved