Question

215=x+150y and 176=x+120y

Answer 1

 {x,y} = {20,13/10}  System of Linear Equations entered :  [1] x + 150y = 215   [2] x + 120y = 176 Graphic Representation of the Equations : 150y + x = 215 120y + x = 176 Solve by Substitution :

// Solve equation [2] for the variable  x  
 

[2] x = -120y + 176

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

  [1] (-120y+176) + 150y = 215   [1] 30y = 39

// Solve equation [1] for the variable  y  

  [1] 30y = 39    [1] y = 13/10 

By now we know this much :

  x = -120y+176   y = 13/10

Use the  y  value to solve for  x  

  x = -120(13/10)+176 = 20 Solution : {x,y} = {20,13/10} 

Answer 2

X=75 becuasetwo hundred and fifteen minus one hundred and fifty is 75. The other one is 56 because fifty six plus one hundred twenty is 176