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x=1
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27\sqrt{1+\frac{55}{729}}=27+x
Multiply both sides of the equation by 27.
27\sqrt{\frac{729}{729}+\frac{55}{729}}=27+x
Convert 1 to fraction \frac{729}{729}.
27\sqrt{\frac{729+55}{729}}=27+x
Since \frac{729}{729} and \frac{55}{729} have the same denominator, add them by adding their numerators.
27\sqrt{\frac{784}{729}}=27+x
Add 729 and 55 to get 784.
27\times \frac{28}{27}=27+x
Rewrite the square root of the division \frac{784}{729} as the division of square roots \frac{\sqrt{784}}{\sqrt{729}}. Take the square root of both numerator and denominator.
28=27+x
Cancel out 27 and 27.
27+x=28
Swap sides so that all variable terms are on the left hand side.
x=28-27
Subtract 27 from both sides.
x=1
Subtract 27 from 28 to get 1.
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