2x+21+8=x+21

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



2x+21+8=x+21

We move all terms to the left:

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

We add all the numbers together, and all the variables

2x-(x+21)+29=0

We get rid of parentheses

2x-x-21+29=0

We add all the numbers together, and all the variables

x+8=0

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

x=-8

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