Math Solve equations Equivalent transformation

Equivalent transformation

Linear equations and fractional equations are solved by equivalent transformation.

Linear equations are equations of the form:



In equivalent transformation, the whole equation is added, subtracted, multiplied, or divided by the same number other than 0 without changing the solution set of the equation.


  • $x+8=18 \quad|\color{red}{-8}$

  • $5x=25 \quad|\color{red}{:5}$