1-4(a+1)=7+8

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Solution for 1-4(a+1)=7+8 equation: 



1-4(a+1)=7+8

We move all terms to the left:

1-4(a+1)-(7+8)=0

We add all the numbers together, and all the variables

-4(a+1)+1-15=0

We add all the numbers together, and all the variables

-4(a+1)-14=0

We multiply parentheses

-4a-4-14=0

We add all the numbers together, and all the variables

-4a-18=0

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

-4a=18

a=18/-4

a=-4+1/2

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