3x+21=3(11)+21=30+21=51

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Solution for 3x+21=3(11)+21=30+21=51 equation: 



3x+21=3(11)+21=30+21=51

We move all terms to the left:

3x+21-(3(11)+21)=0

We add all the numbers together, and all the variables

3x+21-332=0

We add all the numbers together, and all the variables

3x-311=0

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

3x=311

x=311/3

x=103+2/3

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