7(2a+3)+21=100+40a=

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Solution for 7(2a+3)+21=100+40a= equation: 



7(2a+3)+21=100+40a=

We move all terms to the left:

7(2a+3)+21-(100+40a)=0

We add all the numbers together, and all the variables

7(2a+3)-(40a+100)+21=0

We multiply parentheses

14a-(40a+100)+21+21=0

We get rid of parentheses

14a-40a-100+21+21=0

We add all the numbers together, and all the variables

-26a-58=0

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

-26a=58

a=58/-26

a=-2+3/13

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