He is good at solving that equation.

This equation is linear.

This is a linear mathematical problem.

I am learning how to solve differential equations.

Understanding chemical equations is difficult.

He is good at solving algebraic equations.

Linear algebra is a branch of mathematics that studies the theory of vector spaces and linear transformations.

This problem can be solved using the principle of linearity.

Roundworms are an important part of the soil and contribute greatly to the health and fertility of the soil.

This new car is characterized by its streamlined design.