To solve these equations, we need to find a common denominator and then add or subtract the fractions.
Therefore, the answers are:
To solve these equations, we need to find a common denominator and then add or subtract the fractions.
2/3 + 2/7 = (14/21) + (6/21) = 20/215/10 - 7/15 = (3/6) - (2/3) = 1/69/10 - 1/12 = (108/120) - (10/120) = 98/120 = 49/605/7 + 1/28 = (20/28) + (1/28) = 21/28 = 3/4Therefore, the answers are:
20/211/649/603/4