X+4x/5=81

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Solution for X+4x/5=81 equation: 



X+4X/5=81

We move all terms to the left:

X+4X/5-(81)=0

We multiply all the terms by the denominator


X*5+4X-81*5=0

We add all the numbers together, and all the variables

4X+X*5-405=0

Wy multiply elements

4X+5X-405=0

We add all the numbers together, and all the variables

9X-405=0

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

9X=405

X=405/9

X=45

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