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** monter:** Equations
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##

Define an equation : `equal`

`equal` takes as argument the two member of an equation.

`equal` returns this equation. It is the prefixed version of `=`

Input :
`equal(2x-1,3)`

Output :
`(2*x-1)=3`

We can also directly write `(2*x-1)=3`.

giac documentation written by Renée De Graeve and Bernard Parisse