4x-21=2(4x+5)-7

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Solution for 4x-21=2(4x+5)-7 equation: 



4x-21=2(4x+5)-7

We move all terms to the left:

4x-21-(2(4x+5)-7)=0



We calculate terms in parentheses: -(2(4x+5)-7), so:

2(4x+5)-7

We multiply parentheses

8x+10-7

We add all the numbers together, and all the variables

8x+3

Back to the equation:

-(8x+3)



We get rid of parentheses

4x-8x-3-21=0

We add all the numbers together, and all the variables

-4x-24=0

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

-4x=24

x=24/-4

x=-6

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