7s+21=77

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Solution for 7s+21=77 equation:



7s+21=77
We move all terms to the left:
7s+21-(77)=0
We add all the numbers together, and all the variables
7s-56=0
We move all terms containing s to the left, all other terms to the right
7s=56
s=56/7
s=8

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