change the equation into the form of x=, for example, x+2=2+3. to change the equation into the form of x=, move the +2 in -2.

this principle is actually the principle that adding or subtracting a number to both sides of the equation does not change the equation: x+2=2+3

X+2 （-2）=2+3（-2）

launch: x=2+3-2

another example: 2x+10=x-8+2

move x to the left first 2x-x=-8+2-10 (-x in 2x-x is obtained by moving the term "x" takes away the rest. you can think of "x" as +

then calculate x=-16