Mathematica I dont quite understand the mathematica language. linear equations

[offtheleft]

how would i get it to solve linear equations and linear systems, especially in the form;
y=ax+b

my professor and i found out that it likes brackets "[ . . . ]" and double equal signs "=="

i know its probably painfully obvious but any input would be tremendous!

 

[Dale]

Just use LinearSolve

 

[offtheleft]

that would be under the algebraic manipulation palette?

so i would just type out y=\frac{5}{4}x-2 and press linear solve or do i have to type out;

y=\frac{5}{4}x-2 and give a set like {x, 3, 4} or something?

 

[Dale]

If your equation is that simple then you can use:

Solve[y == 5/4 x - 2, x]

LinearSolve is for solving large systems of linear equations in matrix form.

 

[offtheleft]

i put that in and i get this.

{x -> (4 (2 + y))/5}

its quite confusing.

 

[offtheleft]

i put in "Solve[2x-y==0]" and i got:<br /> <br /> {{y \rightarrow 8}}