exam Maths Puzzle Numerical Ability

adding fractions. write each result in simplest form.
(9/14)+(10/21)=

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exam Other Question

-6+x/4=-5 This is a fraction equation with negative. I am trying to help and have forgetten how to do these. Thank you so much for your help. Robin Please help me solve: log base 5 (7+x) + log base 5 (8-x) - log base 5 2 = 2