1/8 + 3/13
To find a common denominator, multiply 8 and 13, which is 104.
Multiply the 1/8 by 13/13, which is 13/104.
Multiply 3/13 by 8/8, which is 24/104.
Now that they have a common denominator, you can add them:
13/104 + 24/104 = 37/104.
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As a decimal, 0.076923 repeating
1/5 plus 1/7 plus 3/10 is equal to 0.642857
1 over 6
8 plus 1 times 12 minus 13 is equal to seven.
The answer to 1 over 2x plus 13 equals 9 is x equals -8.