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\left(\frac{115}{90}-\frac{108}{90}\right)x=11.2
Least common multiple of 18 and 5 is 90. Convert \frac{23}{18} and \frac{6}{5} to fractions with denominator 90.
\frac{115-108}{90}x=11.2
Since \frac{115}{90} and \frac{108}{90} have the same denominator, subtract them by subtracting their numerators.
\frac{7}{90}x=11.2
Subtract 108 from 115 to get 7.
x=11.2\times \frac{90}{7}
Multiply both sides by \frac{90}{7}, the reciprocal of \frac{7}{90}.
x=\frac{56}{5}\times \frac{90}{7}
Convert decimal number 11.2 to fraction \frac{112}{10}. Reduce the fraction \frac{112}{10} to lowest terms by extracting and canceling out 2.
x=\frac{56\times 90}{5\times 7}
Multiply \frac{56}{5} times \frac{90}{7} by multiplying numerator times numerator and denominator times denominator.
x=\frac{5040}{35}
Do the multiplications in the fraction \frac{56\times 90}{5\times 7}.
x=144
Divide 5040 by 35 to get 144.