3x+5x=128*5

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Solution for 3x+5x=128*5 equation: 



3x+5x=128*5

We move all terms to the left:

3x+5x-(128*5)=0

We add all the numbers together, and all the variables

3x+5x-640=0

We add all the numbers together, and all the variables

8x-640=0

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

8x=640

x=640/8

x=80

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