(4+x)*(8+5)=20

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Solution for (4+x)*(8+5)=20 equation: 



(4+x)(8+5)=20

We move all terms to the left:

(4+x)(8+5)-(20)=0

We add all the numbers together, and all the variables

(x+4)13-20=0

We multiply parentheses

13x+52-20=0

We add all the numbers together, and all the variables

13x+32=0

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

13x=-32

x=-32/13

x=-2+6/13

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