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2x-10+3.5=15
Use the distributive property to multiply 2 by x-5.
2x-6.5=15
Add -10 and 3.5 to get -6.5.
2x=15+6.5
Add 6.5 to both sides.
2x=21.5
Add 15 and 6.5 to get 21.5.
x=\frac{21.5}{2}
Divide both sides by 2.
x=\frac{215}{20}
Expand \frac{21.5}{2} by multiplying both numerator and the denominator by 10.
x=\frac{43}{4}
Reduce the fraction \frac{215}{20} to lowest terms by extracting and canceling out 5.