7=x*2-4

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Solution for 7=x*2-4 equation: 



7=x*2-4

We move all terms to the left:

7-(x*2-4)=0

We get rid of parentheses

-x*2+4+7=0

We add all the numbers together, and all the variables

-x*2+11=0

Wy multiply elements

-2x+11=0

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

-2x=-11

x=-11/-2

x=5+1/2

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