3x+16=x+21

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Solution for 3x+16=x+21 equation: 



3x+16=x+21

We move all terms to the left:

3x+16-(x+21)=0

We get rid of parentheses

3x-x-21+16=0

We add all the numbers together, and all the variables

2x-5=0

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

2x=5

x=5/2

x=2+1/2

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