Linear equation

A linear equation is of the form ax + b where a and b are real number and \[a\neq 0 \].

For ex-  1.2x+5     here a=2 and b=5

              2. 8x       here a=8 and b=0

             3.  \[\frac{1}{2x+1} \]    This is not linear equation as power of x is -1 here

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