\({4 \over 8x}+{6 \over 8x}={10 \over 8x}={5 \over 4x}\)

\({6 \over p}+{8 \over 9p}={54 \over 9p}+{8 \over 9p}={62 \over 9p}\)

\({7 \over 4x}+{5 \over 8y}={14y \over 8xy}+{5x \over 8xy}={14y+5x \over 8xy}\)

\(5-{8 \over 9a}={5 \over 1}-{8 \over 9a}={45a \over 9a}-{8 \over 9a}={45a-8 \over 9a}\)

\(3a+{7 \over 6a}={3a \over 1}⋅{6a \over 6a}+{7 \over 6a}={18a^2 \over 6a}+{7 \over 6a}={18a^2+7 \over 6a}\)

\({6a \over b}+{7 \over 5b}={30a \over 5b}+{7 \over 5b}={30a+7 \over 5b}\)

\({4b \over 7a}-{3a \over 9b}={36b^2 \over 63ab}-{21a^2 \over 63ab}={-21a^2+36b^2 \over 63ab}={-7a^2+12b^2 \over 21ab}\)

\({5p \over p}={5 \over 1}=5\)

\({x \over 3x}={1 \over 3}\)

\({-6x \over -21x}=\frac{2}{7}\)

\({45a \over -5a}=-9\)

\({-20ab \over -35ac}={4b \over 7c}\)

\({6y \over -16xy}=-{3 \over 8x}\)

\({15xyz \over 5yz}=3x\)

\({2pq \over q}+{6pr \over r}=2p+6p=8p\)

\({4 \over x}⋅-{3 \over y}=-{12 \over xy}\)

\({a \over 3}⋅-{7 \over b}=-{7a \over 3b}\)

\(-{9 \over 2}⋅p=-{9p \over 2}\)

\({5 \over x}:{9 \over y}={5 \over x}⋅{y \over 9}={5y \over 9x}\)

\({4 \over 3}:a={4 \over 3}:{a \over 1}={4 \over 3}⋅{1 \over a}={4 \over 3a}\)