20+4x=4(-x+7)-40

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Solution for 20+4x=4(-x+7)-40 equation: 



20+4x=4(-x+7)-40

We move all terms to the left:

20+4x-(4(-x+7)-40)=0

We add all the numbers together, and all the variables

4x-(4(-1x+7)-40)+20=0



We calculate terms in parentheses: -(4(-1x+7)-40), so:

4(-1x+7)-40

We multiply parentheses

-4x+28-40

We add all the numbers together, and all the variables

-4x-12

Back to the equation:

-(-4x-12)



We get rid of parentheses

4x+4x+12+20=0

We add all the numbers together, and all the variables

8x+32=0

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

8x=-32

x=-32/8

x=-4

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