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

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

{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}