Question

Find a solution to the following system of equations.

Answer 1

b. (-1,2)
$( - 12$

Answer 2

 {x,y} = {-1,2} 
[2] 5y = -3x + 7 [2] y = -3x/5 + 7/5

// Plug this in for variable  y  in equation [1]

  [1] -5x + 2•(-3x/5+7/5) = 9   [1] -31x/5 = 31/5   [1] -31x = 31

// Solve equation [1] for the variable  x  

  [1] 31x = - 31    [1] x = - 1 

// By now we know this much :

  x = -1   y = -3x/5+7/5

// Use the  x  value to solve for  y  

  y = -(3/5)(-1)+7/5 = 2 Solution : {x,y} = {-1,2}