4-2.5(1+6.5x)=21

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Solution for 4-2.5(1+6.5x)=21 equation: 



4-2.5(1+6.5x)=21

We move all terms to the left:

4-2.5(1+6.5x)-(21)=0

We add all the numbers together, and all the variables

-2.5(6.5x+1)+4-21=0

We add all the numbers together, and all the variables

-2.5(6.5x+1)-17=0

We multiply parentheses

-15x-2.5-17=0

We add all the numbers together, and all the variables

-15x-19.5=0

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

-15x=19.5

x=19.5/-15

x=-1+3/10

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