2x10=102x-10=10

1
Add 1010 to both sides.
2x=10+102x=10+10

2
Simplify  10+1010+10  to  2020.
2x=202x=20

3
Divide both sides by 22.
x=202x=\frac{20}{2}

4
Simplify  202\frac{20}{2}  to  1010.
x=10x=10

Done

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