how do you find X in an equation?

you can enter your equation directly into the input box: -0.5= -2x + 8.1
x=4.3

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Rearrange it piece by piece:
-0.5= -2x + 8.1
Subtract 8.1 from both sides.
-8.6= -2x
Divide both sides by -2.
4.3= x