21-5(7-3x)=2(7-x)-8x

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Solution for 21-5(7-3x)=2(7-x)-8x equation: 



21-5(7-3x)=2(7-x)-8x

We move all terms to the left:

21-5(7-3x)-(2(7-x)-8x)=0

We add all the numbers together, and all the variables

-5(-3x+7)-(2(-1x+7)-8x)+21=0

We multiply parentheses

15x-(2(-1x+7)-8x)-35+21=0



We calculate terms in parentheses: -(2(-1x+7)-8x), so:

2(-1x+7)-8x

We add all the numbers together, and all the variables

-8x+2(-1x+7)

We multiply parentheses

-8x-2x+14

We add all the numbers together, and all the variables

-10x+14

Back to the equation:

-(-10x+14)



We add all the numbers together, and all the variables

15x-(-10x+14)-14=0

We get rid of parentheses

15x+10x-14-14=0

We add all the numbers together, and all the variables

25x-28=0

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

25x=28

x=28/25

x=1+3/25

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