Solve for X
X=\frac{9}{10}=0.9
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X=\frac{1}{5}+\frac{7}{10}
Add \frac{7}{10} to both sides.
X=\frac{2}{10}+\frac{7}{10}
Least common multiple of 5 and 10 is 10. Convert \frac{1}{5} and \frac{7}{10} to fractions with denominator 10.
X=\frac{2+7}{10}
Since \frac{2}{10} and \frac{7}{10} have the same denominator, add them by adding their numerators.
X=\frac{9}{10}
Add 2 and 7 to get 9.
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