Simplify

4/7+3/5+7/10.

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Solution

4/7 + 3/5 +7/10
taking lcm of denominators ( 7 , 5 and 10) ie 70
4×10/70 + 3×14/70 + 7×7/70
= (40 + 42 + 49)/70
= 131/70

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