2(x-1)+7=21

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Solution for 2(x-1)+7=21 equation: 



2(x-1)+7=21

We move all terms to the left:

2(x-1)+7-(21)=0

We add all the numbers together, and all the variables

2(x-1)-14=0

We multiply parentheses

2x-2-14=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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