Who knows how to do this if u know this help me and dont say i dont know this and take the points bc if u do im reporting u got it

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.

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Simply 8x squared + 5(7x squared- x) - 2x =