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2=x+3-2^{2}
Anything divided by one gives itself.
2=x+3-4
Calculate 2 to the power of 2 and get 4.
2=x-1
Subtract 4 from 3 to get -1.
x-1=2
Swap sides so that all variable terms are on the left hand side.
x=2+1
Add 1 to both sides.
x=3
Add 2 and 1 to get 3.