100-7x=13

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Solution for 100-7x=13 equation: 



100-7x=13

We move all terms to the left:

100-7x-(13)=0

We add all the numbers together, and all the variables

-7x+87=0

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

-7x=-87

x=-87/-7

x=12+3/7

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