7x-2x=4

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Solution for 7x-2x=4 equation: 



7x-2x=4

We move all terms to the left:

7x-2x-(4)=0

We add all the numbers together, and all the variables

5x-4=0

We move all terms containing x to the left, all other terms to the right

5x=4

x=4/5

x=4/5

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