494 Chapter 15 MATLAB
Solutions of Simultaneous Linear Equations
In this section, we will show how you can use MATLAB’s symbolic solvers to obtain solutions
to a set of linear equations.Example 15.8 Consider the following three linear equations with three unknowns:x,y, andz.
In MATLAB, the solvecommand is used to obtain solutions to symbolic algebraic equations.
The basic form of the solve command is solve('eqn1','eqn2',... ,'eqn'). As shown below, we define each equation first and then use the solve
command to obtain the solution.
>>equation_1 = '2*x+y+z=13';
>>equation_2 = '3*x+2*y+4*z=32';
>>equation_3 = '5*x-y+3*z=17';
>>[x,y,z] = solve(equation_1,equation_2,equation_3)5 xy 3 z 17
3 x 2 y 4 z 32
2 xyz 13
■Figure 15.28 The ezplotfor Example 15.7; see the last row in Table 15.14.
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