linear-equations code snippets in matlab

consider the following system of 2 equations: 𝑥 + 𝑦 = 1 3𝑥 − 𝑦 = −1. write this system as a matrix equation and solve the system in matlab. in matlab

gaussian elimination using rref in matlab

solve linear set of equations of matrix via mrdivide and compute confidence intervals in matlab

solve set of equations in matlab

you solve a linear system of equations and find that the second response variable is 18.6 units. you then scale the entire vector by 7.3 and re-solve the system. what is the new value of ? in matlab