visualization of the geometry of the system

library(matlib)

## Warning: package 'matlib' was built under R version 4.2.3

A <- matrix(c(-0,-2,-1,2,3,2,3,-2,1), nrow = 3, ncol = 3)
b <- c(6, -1, 2) 
A

##      [,1] [,2] [,3]
## [1,]    0    2    3
## [2,]   -2    3   -2
## [3,]   -1    2    1

b

## [1]  6 -1  2

Solve(A, b)

## x1      =  2.4 
##   x2    =  1.8 
##     x3  =  0.8

plotEqn3d(A,b)

plotEqn3d bisa digunakan untuk memplot geometri tiga dimensi dengan sistem persamaan ini