7=10-3a

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Solution for 7=10-3a equation: 



7=10-3a

We move all terms to the left:

7-(10-3a)=0

We add all the numbers together, and all the variables

-(-3a+10)+7=0

We get rid of parentheses

3a-10+7=0

We add all the numbers together, and all the variables

3a-3=0

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

3a=3

a=3/3

a=1

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