You buy three boxes of cereal at 325 each and one gallon of milk for $2.30. to find out how much the groceries will cost, use a variable model to write and evaluate the expression.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system