4x+3y-2(x to the second power +3) x=4 y=6

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

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.

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)