7(-10+a)=-49

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Solution for 7(-10+a)=-49 equation: 



7(-10+a)=-49

We move all terms to the left:

7(-10+a)-(-49)=0

We add all the numbers together, and all the variables

7(a-10)-(-49)=0

We add all the numbers together, and all the variables

7(a-10)+49=0

We multiply parentheses

7a-70+49=0

We add all the numbers together, and all the variables

7a-21=0

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

7a=21

a=21/7

a=3

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