Symbolic Manipulation 248
To see intermediate results, you can manually solve the equation step-by-step.
Note: An operation such as | 2 p subtracts 2x from both sides.
Solving a System of Linear Equations
To solve this system of equations, use any of the following methods.
Consider a set of two equations with two
unknowns:
2x N 3y = 4
Lx + 7y = L12
Method Example
Use the solve function for a one-step
solution.
solve(2x
N3y=4 and Lx+7y=L12,{x,y})
Use the solve function with
substitution ( | ) for step-by-step
manipulation.
Substitutions are in the form of an
equality, such as x=3 or y=sin(x). To
be most effective, the left side should
be a simple variable.
See ”Symbolic Manipulation” in the
Previews chapter, which solved for
x=L8/11 and y=L20/11.
x « y | 5 Á 2x | 5y
| 2 x
| y
« 5
p ? 1
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