(n*5)*4=(4*5)*2

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Solution for (n*5)*4=(4*5)*2 equation: 



(n*5)*4=(4*5)*2

We move all terms to the left:

(n*5)*4-((4*5)*2)=0

We add all the numbers together, and all the variables

(+n*5)*4-(20*2)=0

We add all the numbers together, and all the variables

(+n*5)*4-40=0

We multiply parentheses

20n-40=0

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

20n=40

n=40/20

n=2

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