1. Find the LCD : LCD = 70
2. Make the denominators the same as the LCD :
3 + 9x10/7x10 + 1x14/5x14 + 1x35/2x35
3. Simplify, make the denominators the same :
3 + 90/70 + 14/70 + 35/70
4. Join the denominators : 3 + 90+14+35/70
5. Simplify : 3 + 139/70
6. Convert 139/70 to a mixed fraction : 3 + 1 69/70
7. Final Answer : 4 69/70