7x-21+4x+8=64

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Solution for 7x-21+4x+8=64 equation: 



7x-21+4x+8=64

We move all terms to the left:

7x-21+4x+8-(64)=0

We add all the numbers together, and all the variables

11x-77=0

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

11x=77

x=77/11

x=7

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