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1,5=x\times \frac{8,1}{2,7}
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
1,5=x\times \frac{81}{27}
Expand \frac{8,1}{2,7} by multiplying both numerator and the denominator by 10.
1,5=x\times 3
Divide 81 by 27 to get 3.
x\times 3=1,5
Swap sides so that all variable terms are on the left hand side.
x=\frac{1,5}{3}
Divide both sides by 3.
x=\frac{15}{30}
Expand \frac{1,5}{3} by multiplying both numerator and the denominator by 10.
x=\frac{1}{2}
Reduce the fraction \frac{15}{30} to lowest terms by extracting and canceling out 15.