2(8+x)=21

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



2(8+x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

2(x+8)-21=0

We multiply parentheses

2x+16-21=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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