(5x+7)4=128

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Solution for (5x+7)4=128 equation: 



(5x+7)4=128

We move all terms to the left:

(5x+7)4-(128)=0

We multiply parentheses

20x+28-128=0

We add all the numbers together, and all the variables

20x-100=0

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

20x=100

x=100/20

x=5

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