Remove the brackets and multiply the algebraic expressions or numbers outside the brackets into the brackets by multiplication and division.
3-shift terminology
Move the sign from the left side of the equation to the right side of the equation. A plus sign becomes a minus sign, and a minus sign becomes a plus sign.
The purpose of shifting terms is to move the unknown and the number to the left and right of the equal sign respectively.
4 Merge similar projects
Items containing unknowns are added and subtracted, and numbers are added and subtracted.
5 coefficient 1
Which is the unknown solution.