Help please it is attached thank you

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

How do you solving the solution of each system using elimination?

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2