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Firstly, you've got to get the 3x alone, and you do this by subtracting 4 from both sides. You always have to do the opposite of the operation in front of the number. Therefore, subtracting four from both sides gives you 3x=10. Then in order to find x, you've got to divide both sides by 3. This gives you x= 10/3 or 3.333 Hope this was able to help you :)