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\frac{x+3}{2}-\frac{17\times 2}{2}
To add or subtract expressions, expand them to make their denominators the same. Multiply 17 times \frac{2}{2}.
\frac{x+3-17\times 2}{2}
Since \frac{x+3}{2} and \frac{17\times 2}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{x+3-34}{2}
Do the multiplications in x+3-17\times 2.
\frac{x-31}{2}
Combine like terms in x+3-34.
\frac{x+3}{2}-\frac{17\times 2}{2}
To add or subtract expressions, expand them to make their denominators the same. Multiply 17 times \frac{2}{2}.
\frac{x+3-17\times 2}{2}
Since \frac{x+3}{2} and \frac{17\times 2}{2} have the same denominator, subtract them by subtracting their numerators.
\frac{x+3-34}{2}
Do the multiplications in x+3-17\times 2.
\frac{x-31}{2}
Combine like terms in x+3-34.