21-2x=8+5

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Solution for 21-2x=8+5 equation: 



21-2x=8+5

We move all terms to the left:

21-2x-(8+5)=0

We add all the numbers together, and all the variables

-2x+21-13=0

We add all the numbers together, and all the variables

-2x+8=0

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

-2x=-8

x=-8/-2

x=+4

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