3x-5(-7-5x)=21

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Solution for 3x-5(-7-5x)=21 equation: 



3x-5(-7-5x)=21

We move all terms to the left:

3x-5(-7-5x)-(21)=0

We add all the numbers together, and all the variables

3x-5(-5x-7)-21=0

We multiply parentheses

3x+25x+35-21=0

We add all the numbers together, and all the variables

28x+14=0

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

28x=-14

x=-14/28

x=-1/2

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