If Tommy
has 4 apples and ate 2. how much does he have left?

2

Step-by-step explanation:

cuz he have 4 and he at 2

=4-2

=2

simple

A linear system is a mathematical model of a system based on the use of a linear operator. Linear systems typically exhibit features and properties that are much simpler than the nonlinear case.A linear system of two equations with two variables is any system that can be written in the form. ... A solution to a system of equations is a value of x and a value of y that, when substituted into the equations, satisfies both equations at the same time. For the example above x=2 and y=−1 is a solution to the system.