4x+21=89

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Solution for 4x+21=89 equation: 



4x+21=89

We move all terms to the left:

4x+21-(89)=0

We add all the numbers together, and all the variables

4x-68=0

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

4x=68

x=68/4

x=17

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