0.5(a+3)+7=21

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Solution for 0.5(a+3)+7=21 equation: 



0.5(a+3)+7=21

We move all terms to the left:

0.5(a+3)+7-(21)=0

We add all the numbers together, and all the variables

0.5(a+3)-14=0

We multiply parentheses

0.5a+1.5-14=0

We add all the numbers together, and all the variables

0.5a-12.5=0

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

0.5a=12.5

a=12.5/0.5

a=25

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