2(x+1)+3=21

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Solution for 2(x+1)+3=21 equation: 



2(x+1)+3=21

We move all terms to the left:

2(x+1)+3-(21)=0

We add all the numbers together, and all the variables

2(x+1)-18=0

We multiply parentheses

2x+2-18=0

We add all the numbers together, and all the variables

2x-16=0

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

2x=16

x=16/2

x=8

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